I finished Chrono Trigger and am coming back to Mega Man X2.
I'm going to check out the GB Super Mario/Wario Land games, and Donkey Kong Country 2. I have vague memories of seeing a friend play something that must've been Super Mario Land 2: Six Golden Coins.
I've heard that game is awesome, I'll just plaaaaaaay it and see if it's fun.
I've also heard that "The Castlevania Adventure" is horrible, but some guy at a fansite called "The Inverted Dungeon" claims the crappy aspects overwhelm the good ones. I should check it out, it might not be as horrible as we all think.