The system I have the least for is the 32x. By least I mean 1, Doom. It plays decent, but the music is so ear-piercingly awful that it kinda ruins the whole experience. Beyond that, I have only 3 Sega CD games, 4 Game Gears, and 5 Master System games. Only 7 Colecovision games, too. Sadly I don't find Colecovision games too much.

I do wanna get more Master System games, though, cuz that system's great. Aside from the pause button being on the console itself. U don't realize how great it is to have that pause button on the controllers until u play the Master System.