I'll name 2 games from each genre based on personal stuff I've personally played on the console. Tough choices and several awesome omissions I tell ya:
- Racing: Metropolis Street Racer/Tokyo Xtreme 2
- Action: Spawn: In The Demon's Hand (multiplayer)/Rent a Hero no.1 (dc is jpn only but on the og xbox there's an english version on the web. Worth a try definitely. Game's awesome and is packed with sega 90s goodness)
- Shmups: Ikaruga/Cannon Spike
- Fighting: Project Justice/Jojo's Bizarre Adventure
- Fps: Outrigger/Silent Scope (not an fps but awesome game)
- Rpg: Skies of Arcadia/EGG (elemental gimmick gear, great art, cool story)
- Imports: Zusar Vasar (easy racing wacky weird jpn ""racing"" game) / RoomMania #203. Click
here to see a bit of this weird but cool game. To enjoy well ya gotta know japanese but there are guides out there.
- Weird and awesome: L.O.L / Seaman (mic is needed!)
- Miscellaneous: Samba de Amigo/Chu Chu Rocket
;)