Store this in the "who cares? file": Project Gotham Racing is the very first game I bought with my Xbox way back when. Anyways, I like it, but think it is slightly over-hyped. Sure it looks pretty, and has lots of cars, but I found it to be flawed in a few areas. It needs a greater sense of speed, and I'm still not sold on the whole "Kudos" system. I so wanted to take the cars out on a country road (like Need for Speed) and just drive a straight road.
I found the courses to be too confined and PGR is more about the ability to take corners than it is about blazing through a straight section of road. On the plus side, there are a LOT of gameplay options and no shortage of unlockables. There is a punishing degree of difficulty as the game progresses.
It is a pretty racer. Great looking cars and scenery. Just lacked a sense of speed for me. And, I don't think it looks as good as RalliSport in comparison.
Custom soundtracks always rock, because it's music I picked. The cars sound great. I love the opening theme (Galaxy Bounce) Everything is perfect here!