all the mentioned games are great, i just wanna mention one thing to you Chad. Even if you don't like fighters, try Power Stone or Power Stone 2... very unique games, and a ton of fun.
I also really like:
Bangai - O
Fur Fighters
Ooga Booga
Frogger 2 is decent
Samba de Amigo (if you can find the maracas)
Giga Wing 2
Zero Gunner 2
Rayman 2 (I love the DC version for some reason)
Virtua Tennis and Virtua Tennis 2k2 (doesn't matter if you don't like sports games, these are ADDICTIVE)