I expected a lot of games I'd never heard of, but I've heard of, played, and liked a good portion of these games. Go me, I guess.
For me, 2 games immediately came to mind. Hybrid Heaven for the N64, and Shadow of Destiny for the PS2. Admittedly, I played them a while back, and mostly just remember thinking 'this is the best stuff ever, how does nobody I know play this!?' when I had them. Shadow of Destiny is a game I've actually done a few playthroughs of, even recently, and still loved it - despite some of the worst voice acting I've ever heard. My Hybrid Heaven cartridge is wrecked, though, so I can't really do a retrospective look at that(although it looks like many reviewers didn't like it as much as I did).
Oh, also, The Bouncer for PS2. Me and my friends always played it when it came out, took me a long time to realize it wasn't as popular outside my circle of friends.
P.S. Long time lurker, finally made an account just to post this.