I still play a couple levels of 32x Doom every now and then for a nostalgia kick. The instrumentation on the music is poor and it sucks that the enemies are always facing you, but it's was great port for the time.

I finally got a chance to play Doom 64, a game I've heard nothing but good things about over the years, and I find it totally unplayable. The thing is so dark all I can see is the HUD.