i swear they dropped more gameplay for gta4 since the last one. you couldnt play bball, couldn't customize your character half as much as san andreas, no side robbery missions, no taking turf (understandably, but it was another thing to do in gta:sa). and they got rid of bicycles! man you could cover ground + explore every nook n cranny on a bike way quicker than walking, and do tricks to break the monotony.
i remember the first hour i started GTA 4 i was like why cant i do this! or this!