Blast Corps: That game just doesn't end. You think you've beaten it, and then you haven't. And then you beat that, and there's still more. And then once you meet those qualifications, there's still more stuff to do. I don't know what's after that, since I only got that far.
Conker's Bad Fur Day: "I am The Great and Mighty Poo, and / I'm about to fling my <beep> at you...." C'mon, that's quality f%$#ed up humor right there.
Goldeneye: Do I actually need to say anything?
Killer Instict: It's nice to see KI in the environment it was supposed to be in the first time around. Combo linkers have changed on pretty much everyone though, and there's no Cinder or Riptor.
Don't really know beyond that. At the moment. I'll check my N64 library when I get to the folks' place tonight. (It's Cioppeno night. Mmmm)