Just got my ODST yesterday and beat it with some friends. They wanted to rush through the entire thing for whatever reason...I guess achievements, and so we did. I watched barely any cutscenes so I don't know what the hells going on. ^_^ About to start going through it on my own.

What I did notice through out the entire game was the MUSIC! The music is absolutely phenominal and fits the games perfectly. I believe it's even better than Halo 2's OST. :3 Just amazing all around...absolutely amazing. The games depressing atmosphere mixed with this music...golden. Youtube it now!!!