I don't want it to seem like I'm down on Melo, because I do genuinely want for him to be a big success. But I do think people here are glossing over some big issues, and the reasons why he was such a polarizing player even for Syracuse fans.
IF his issues were just academic, that would be totally understandable--the NCAA's myth of the "student-athlete" in D1 revenue sports is a way for them to exploit these kids, and we all know that. But it wasn't just one mistake, and it wasn't just academic.
During his freshman year, he was arrested and had to pay damages and do some sort of probation for getting rough with his girlfriend. This wasn't innuendo, it went to court and the girl got an order of protection from the judge. He caught a suspension for that in February 2011. The next year, he gets suspended for academic reasons once during the season, then gets reinstated, then suspended again on the eve of the Tournament (for what Boeheim said were "non-academic reasons"), effectively destroying the Orange's chances at a Final Four run.
Look, college kids do stupid things all the time, so I'm not saying that any one of these things is proof that he's an awful person. It just raises a red flag for me that at no point during that process, knowing how important he was to a team with title dreams, knowing how much a spotlight he'd put on himself with his prior mistakes, knowing how much his team needed him to stay eligible--the kid never stopped going to the bars during the week, never just said 'Until the season's over, I am on my best behavior. My team needs me to get a 2.0 GPA and to stay out of trouble, and I'm going to do that."
I think he can absoutely be an asset to the Celtics and I'm rooting for him to. But he can't just get a 'pass' on not being responsible. He'll have to make some changes, and he's going to have to hold himself accountable. KG and Paul and Doc sure will.