Is it the game or the xbox?
My xbox has been running great for about 1 1/2 years. I've had the occassional freeze/glitch, but nothing major. I just bought KOTOR II and it froze on the title/start up screen. I returned the game, the second one works until I try to name my character. I tried all 6 characters with quick and custom setups, and every time it froze on the name. I then went and rented the game, and it also freezes on the name.