GOG used to have only (IBM) PC games, with a little Amiga games.

But best version of many games is not on PC. What platform(s) you want to see here most?

1977 Apple ][
1977 TRS-80
1980 VIC-20
1980 TRS-80 CoCo
1981 TI-99/4A
1981 BBC Micro
1982 ZX Spectrum
1982 Commodore 64
1982 PC-9801
1983 MSX
1984 Macintosh
1984 Amstrad CPC
1985 Atari ST
1985 Amiga
1986 Apple IIGS
1987 X68000
1989 FM Towns
1994 Power Macintosh (PowerPC based)
Others...

My priority will be:
PC-9801, Apple ][, Commodore 64, Amiga, FM Towns, X68000

I like old Macintosh but there are not many exclusive games there.

UPDATE: add TRS-80 CoCo and Power Macintosh

1985 Amiga

ZX Spectrum

Amstrad? You mean Schneider CPC 464, right?
Oh, and of course I like Amiga 500 and Amiga 1200 too!

^ This, obviously :P

All of them.

Only computer platforms, or also consoles? Some console systems with which I am less familiar, like:

Sega Dreamcast (at least for those games which don't have PC ports already)
Atari Jaguar (yes, really! I want to play e.g. the Jaguar version of Aliens vs Predator which I presume is considered as the best Jaguar game probably)
Nintendo 64
Gamecube

There are also some ancient computer systems which I'd be interested to see (what kind of games they had), but I am unsure how much I'd be willing to pay for their games. Maybe 9€ for a pack containing all their games? For instance:

TRS-80 CoCo (or whatever it was called?)

Amiga!
Amiga!
Amiga!

Considering I've never had an opportunity to play any games from any of these systems, I'd be happy with just about any coming here.

I'm all about more Amiga games coming here, but GOG needs to partner with the owners of the kickstart rom or buy them out to make it happen.

One could just get an emulator, but then one could do the same for old DOS games. The point is some of us would like to own digital copies on our computers legally. Selling emulated console games, if GOG could swing it, wouldn't be any less legitimate than what they're already doing.

Naturally that goes to all the proposed systems here, or any games for that matter. Of course you can also obtain them illegally, but I don't think the point of this thread was to promote piracy.

Legal or not, some emulators can be a real pain.

I just want to play 'Wings of Fury' without the five minutes of setup and loading.

Reddit retrogaming Flair Stats for the end of 2016:
24.2% Windows
24.2% DOS
16.8% Commodore 64
10.0% Amiga
06.2% ZX Spectrum
04.4% Apple ][

Maybe GOG should sell some Commodore 64 games here...

Since I grew up with only PCs, PC is just fine for me.