goddamn, all this talk about xbox has got me wanting original xbox games.
It didn't have quite the monumental effect the 16-bit consoles had one me, but there are a few gems. Halo, KOTOR, Burnout 2, Forza Motorsport (though the newer ones have only gotten better imo), Ghost Recon, Mechassault, Splinter Cell.
Random useless tidbit: While working for Red Storm, I worked on a patch for Ghost Recon: Advanced Warfighter. That was about the most fun I had working there. The other games I worked on were pretty bad. I'm pretty sure I was credited in Rainbow Six: Lockdown for the PS2, but it was so bad I declined a release copy.