Blast Corps was awesome. The camera angle gave my spatial reasoning a workout, but the controls were responsive and the dump truck stuff was great. Remember that level where you had to go back and forth to different sides of a set of train tracks, swinging the back of the truck to clear it out?
I miss games with strict time limits. I appreciate the freedom of GTA sandbox style games, but I think I prefer action games based on urgency and a small skillset, rather than exploration, customization, and collecting.
N64 games hold up a bit better (edit: graphically) than PSX games now, but that's more to do with the PSX's huge pixels, and the Saturn's 2D games were the prettiest ones anyway. Heck, Genesis and SNES 2D games look better than the first gen of 3d games.