Yup, something that really bothered me with the 360 is because they made the hard drive optional cool hard drive features were left out. Some games had custom soundtracks but it just like playing music over the game, not incorporating it into the soundtrack like a radio station for GTA or the custom NFL 2K5 stuff.
I had an OG Xbox because my PS2 died and I was upset and also wanted to play KOTOR so I got an Xbox. Good times.