hmm, this is a tough one. I like the old PC classics like Doom; but I'm also quite fond of old console games. Like Super Mario World, which I haven't played in a while. For good reason. Might be related to the week I was trying to record a ZSNES movie and went through the entire game every day for a week. I Had the entire thing down to a science...
And of course the movie desynced about 10 minutes in. (basically leaving 2 and a half hours if mario jumping around and undoubtedly killing himself)