It depands on what the game developer wants (kind of game, money, no money, target on special hardware, a fun thing, own personal restrictions, ...). It may not fit with user wishes. My personal hardware target wish is AGA, 030+, 8MB+ (maybe 16MB), HD. I think the most users have at least such a config because it was default in mid `90. A good looking/sounding game is possible with this and creativity isn`t limited so much.
A stock A1200 is too limited (only 2MB chipram is a pain). If you make a game for A500 (maybe + 512kb Ram) it might be a good idea.