I think it's a combination; like you said, rushing into it, not taking the time to really get to know eachother, unbalanced success (like with Xtina, she was 100000000x more successful than her husband so it creates conflict), different interests, age differences seem to cause problems too (like one spouse might want to go partying while the other one is trying desperately to get pregnant and have a family), and I just think that some of them aren't meant to be together. The paparazzi DO play a role in destroying marriages, I think, because there's absolutely zero privacy, and while normal couples might just have their little arguments from time to time, celeb couples can't do that without being front page news.
