Well, when I think about this question, I think about how Jesse was for the 5-10 years before FH started. Needless to say, nothing in the show suggests he was any different. He was really like that for a long time, through his adolescent years up until he turned about 24. Even in the first season, you can read into a few clues that he's about done with being a rebel/hipster type. The very idea he would walk into a house with three young kids with no strings attached is one of the most prominent signs. Another is that Jesse's rebellion at this point is almost fully external; you could hardly say that him being a "bad ass" affected whether he came home drunk at 3am for several days straight, etc.