I notice that he seems to get jerkier as the series goes on, at the begining he was sweet though kinda self-centered but now in season four he is starting to act like a jerk. I think it is because he is not able to spend as much time as he wants/should with Mac. I like it when Bloo is jerky though (even though I wanna pop him one) because he balances out Mac, Wilt, Coco and Ed. He is the healthy does of nitro
@Emma: I sorta hope Bloo does something that will cause a riot amongst the fangirls. It will be halrious to watch (both in GWH and amongst the fangirls) but I bet in the end (if Bloo does cause a riot) by the end of GWH he will make up for it.