I managed to get a few in before the ball drops!
Battalion Wars - I had played through about half of this game before, but for whatever reason, I never managed to finish it. I thought it was a great and unique game. I'm kicking myself for not picking up the sequel, now I'll have to try and scrape up a nice used copy somewhere.
Star Soldier: Vanishing Earth - I always wanted to rent this game back in high school, but I had so many other N64 games I wanted to play, so it never happened. I had to shell out some cash for this one, but it was a really fun game. It's too bad it only took like an hour to beat, but at least it's highly replayable :P
Spoiler Alert - I beat this game with 100% completion in less than an hour, but it was fun. I think I paid like $1 for it in a previous sale and it was definitely worth it. It was simplistic, short, but fun.
ChuChu Rocket! - I bought this game the day it came out and I just now finished all of the single player puzzles! I got stuck on one back in high school and mainly played multiplayer anyways. It's such a shame they never gave this game a sequel.
Arc the Lad - I rolled through this game in like 2.5 days and it was EXACTLY what I was in the mood for. It's fairly short for a JRPG (about 13 hours), but I loved the combat system. It reminded me of a faster paced Shining Force. I'm a little scared of the sequel since it's supposed to be significantly longer, but the first game is really just a prologue, so I'm gonna have to try it at some point!
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