BC2 does require you to move around a lot more, leading to a move active, fluid game, and I like that. On the other hand, I also like RO's style of play, which is a bit slower, and sometimes requires more thought before charging into a room. Of course, there are roles that are meant to be camping roles, such as the sniper. I do like in the rush maps on BC2 though, that the sniper has to move more often, else his hidey hole will be a neat pile of rubble with him in it somewhere.