Sovstacker

Start with the newer stuff.

So, after some evolution in my thoughts on this, here are my favourites in order - for me, good looking and photogenic beats rare.  If a rare coin were to fall into my lap I'd be happy, but I'm not particularly interested in coins just for their rarity or bragging rights.
George V: These are my favourites because they're relatively easy to get in good condition with low premiums, as they were largely uncirculated, and produced in large numbers.  The McKennal portrait is very photogenic and has good definition, so they're easy to get good photos of.   You can collect George V sovs, as there are more than 60 varieties, and a date run of 22 is reasonably achievable if you feel so inclined.  The low premiums also mean that the spreads are low, so they're good for stacking, and photogenic ones are easy to sell.  Really, gold is not a good speculative investment at the best of times - if you're looking for volatility, trade crypto.  
Machin: The Machin portrait was the last to come in gold coloured alloy, and has much better relief than the Gillick portrait.  This makes them much easier to get good photos of, and from this perspective, it's probably #2 behind McKennal's George V.
Gillick: The Gillick portrait is nice, and they're fairly easy to get in good condition with low premiums.  However, the Achilles heel of the Gillick is the low relief of the portrait, which does not photograph well.  If you go for contrast, the surface tends to show blemishes off badly, makes Liz's face look like she has vitiligo or cystic acne.  Nice, but shows blemishes badly and they're hard to get good photos of unless in near-pristine condition.  On the plus side, the alloy with slightly less slilver than the 197h century ones has a nice warm colour, but not too coppery.
Victoria (young): Wyon's portrait of 18 year old Victoria is a classic and is arguably the nicest of the portraits, although I think McKennal's George V gives it a run for its money.  However, as they were circulated coinage, most are in rather rough condition, and good ones are quite uncommon.  Also, they tend to command a premium so by and large the value has aready been extracted by the time you get them.  Maybe 10 years ago, shields would have been good value.
The shield reverse is a nice design, but it pays to remember that every sovereign minted between 1821 and 1871 and about half of all Australian sovs from 1872 to 1887 had some variant of the shield design, and every half sovereign between 1821 and 1892 was a shield.  Shields aren't rare - shields in good condition are rare.  There are a lot folks flogging munters at rather optimistic prices, so you do have to pick and choose which ones you buy.  Out of the 20 or so young vic sovs I've bought and sold in the past year, only three are of a quality that I actually want to keep, and those are really in the gVF to aboutEF range.  Young vics are all very fine, but don't overpay.
Victoria (old): Examples in good condition are fairly easy to come by, and they're not in demand in quite the way that young vics are.  They can be good for stacking as they're quite common, and they don't show wear anything like as badly as jubilee portrait coins do.
Edward VII: Like Old Vics, good examples aren't uncommon, and they aren't in demand by collectors.  Some have large mintages as well.  Edward VII sovs look quite good when they're in good condition, as the mint lustre shows up in Ed's hair particularly.  From that perspective they can be quite photogenic in good condition.  The De Saulle portrait isn't all that inspiring, though.
Victoria (jubilee): The Boehm ('Jubilee') portrait shows wear very badly, and poor old Victoria often ends up looking like a kewpie doll.  If you can find examples in good condition they look fairly nice, but good examples aren't common.  I've ever had precisely two Jubilee in a condition I want to keep, and quite a few munters.
Modern: The copper colour and move to a shiny finish has spoiled modern sovs to some extent.  It wouldn't take a lot of silver to bring up the colour - the typical silver content of a 19th century sov is about 3-4 parts per thousand.  As this would cost about 1.5p per coin, and finishing the dies with the satin finish would be a trivial accomplishment for modern die cutting technology, science is powerless to explain why RM don't do this - and RM's own explanations are famously less than satisfactory.  When PAMP-MMTC minted sovs for a few years, they made a point of producing them in a yellow alloy and emphasizing this in their advertising.

A quick mockup...

You are on my mind. I couldn't agree more.

I don't (and never will) agree with those who state a 'bullion' coin is just a lump of PM - making condition irrelevant. If you are paying a premium for a manufactured item then you have every right to expect something in good condition... It's like receiving a brand new toaster covered in dings and scratches and being told that it will 'still produce toast so what's the problem'. That would be unacceptable to pretty much everyone.
Dictionary definitions of bullion 'gold or silver in bulk before coining, or valued by weight' ..''metal in the mass'  etc etc
Obviously there is a problem for re-sellers of coins who receive poor quality product from the RM. But that is their problem and should not become the end purchasers problem. Ever. Passing on defective coins rather than taking the issue up with the manufacturer is something that would not be accepted anywhere else. 
The only time selling blemished coins is acceptable is when they are clearly described as such (and priced accordingly). Using a catch-all 'bullion' description, as well as having no valid definition when it comes to coins, is lazy and morally suspect.
Obviously that is my opinion as a collector. A stacker may well have a different view. 😎
 

£1664 

It was the first thing I thought when they came out on the market.

i quite dont get this cancellation rush guys...
what changed now compared to the day you placed your orders? mintage was clearly stated, dispatch time was clearly stated, price-s were stated, the reverse was shown...

1 Oz + 1/4 Oz finally complete 🥰

What a set 😍

I am lucky enough to have the 1980 first edition signed by Michael Marsh.

I am lucky enough to have the 1980 first edition signed by Michael Marsh.

BTW.....My Marsh guide is hand signed by Steve Hill........Wow. 

I am lucky enough to have the 1980 first edition signed by Michael Marsh.

Right click --> view source on page 
 
It's in the code the notepad file that'll launch 

It's not like we have a new monarch everyday. Unlike prime ministers...

Full sovereigns for me!

Full sovereigns for me!

Full sovereigns for me!

Interesting listening and I now understand why we have Greek collectors of Sovereigns.
There's a little about red colour Sovereigns and the royal mint modifying the alloy with silver about 35:30 minutes through, especially for @LawrenceChard

A quick snap to remind me until I next see them. 😍🗄️🔒
Edit... Colour difference due to my lighting set up (or lack of) 

I can't remember the first coin we decided to count the edge serrations on. It may have been a Krugerrand, or it could have been a sovereign.
I can remember getting complaints from the staff member I tasked it to. Despite him being someone with a University degree, albeit in history. I had to nanny him by working out ways to accomplish the task. The simplest method was to use a very fine tipped pen to mark the starting point, and then to mark every tenth ridge around the coin. There was a lot of grumbling, many recounts, and a few second opinions. Clearly there had to be a better method.
I asked our photographer (at the time) to take our usual macro photos, but place the coin on a reflective concave surface, so that the edge serrations were clearly visible. You would have thought I had asked him to undertake a moon landing! Again, this was someone with a (master's) degree in photography. I had to provide the ideas about what he could use, and then I had to find the actual objects to try out. Once we had taken the shots, I had to "invent" ways to mark out the serrations, and to clearly show the count. Eventually, we got the images I wanted.
As we have recently done a number of serration count images, and also denticle counts, I thought it worthwhile to create a new topic / thread, so here goes:

Edge serration count on a 2022 (bullion) sovereign. I should mention that there are 108 serrations, as shown.
More to follow, but all TSF members are welcome to contribute.
🙂

Generally the more difficult the striking process the more difficult the counterfeiting.
So it's probably harder to find a fake proof coin. 

Well getting close to another year gone collected a few bits to add to last year's pics concentrated more on the harder to get years 

Happy and Blessed New Year!