Please, just pick one game.
For me, it would have to be 25 to Life. I miss that game so much. I remember I rented it from Gamefly with my Gamepass because I heard the LAPD and Hillary Clinton were trying to get it banned. I kept it in my possession for over a year and nothing happened. I eventually bought it.
My biggest regret was selling all of my Original Xbox games and my system. I should have kept them all and taken them with me during the move but I figured I would never play an Original Xbox game online again since the Xbox 360 was released. How wrong I was. I started purchasing all the Original Xbox games again but they were hard to find because the nearest Gamestop was an hour away.
The games I used to possess on Original Xbox were:
25 to Life
Call of Duty: Finest Hour
JSRF (Jet Set Radio Future)/Sega GT 2002
Midnight Club 3: DUB Edition
Rainbow Six 3
Rainbow Six 3: Black Arrow
Soldier of Fortune 2: Double Helix
I played these games online for 6 hours a night!