The added dynamism to the missions is nice. For example, early in the game you can date a girl, and the first time you're on your way to pick her up your cousin calls, as he is getting beat up by thugs. Seeing as Roman is a bum, I left him to his fate and went on the date. After the date Roman calls and you get into an argument about your putting "cooch over cousins", and you have to pick him up from the hospital (later, after a strip club visit with Roman, I crashed the motorcycle we were riding and had to pick Roman up from the hospital again). I went on another date that did not go well and in a pre-mission cutscene I was grilled by Roman over how it went, and I was evasive about it. I don't know if doing things differently results in huge differences, but the way the game flows feels really natural. Also, the lines between side missions and main storyline missions is blurry. At this stage, though, everything feels like a side-mission.
A little miffed at the apparent lack of custom soundtracks.