Gosh, yo - there's plenty of drama on LJ. Totally depends which community you frequent! The difference is that you choose your own bunch of friends and thus create your own community. So, if you choose your friends wisely, you can totally avoid the dramaz! Mind you, that is possible on Bloop too - but people here are drawn to drama like flies to shit, yo!
The thing with LJ is that if you want the dramaz, you can totally select what kind of dramaz you want too, because it's so big and there is so much choice, and there are totally pre-made communities you can join as well as selecting your own bunch of friends. Like there is a community where people talk/debate/argue/get all snotty about grammar and linguistics, yo (a favourite hangout of mine - it is quite entertaining to behold! And there are quite a few people who really know their stuff, so it's a good place to ask questions too!)! And I hear some of the knitting/crafty type communities get quite a bit of drama, but they bore me, yo, so I don't go to them.
Actually, I find LJ a lot more mature and close-knit than Bloop, but that is only because of my own particular circle of friends there. It is a different experience for everyone. It's apparently famed as an emo hangout, if the emo song is to be believed! ;D