The 32X is one of those things that, in death, manages to be forgiven of its sins.
In 1995, it was utterly ridiculous, but these days, if you're a Genesis fan, picking up an old 32X and some games for cheap is a gateway to a hell of a weird and fun experience. Tempo and Knuckles Chaotix are the crowning games on the system thanks to their mid-90s Sega gaudiness that I honestly enjoy quite a lot.
In addition, Space Harrier is a rock-solid classic, Kolibri is a great game to show guests and go in for 2P simulteneous, Shadow Squadron is a surprisingly decent early 3D game with a nice framerate, and Blackthorne, while not my personal cup of tea, has its best port on the 32X.
Mortal Kombat II is arguably just as good or better on the SNES, though - better music, better backgrounds, and no loss in gameplay. The 32X port only has slightly nicer sprites and cleaner voice samples.