IMO it has nothing to do with personality, but rather the level of addiction. People of many different types of personality fall to addition. That said, if she was taking Xanex bars and cocaine every night, as often as Jim Bulushi did drugs, I find it hard to believe she could have performed so well in college. There have been comments regarding what a great student she's been. We need to remember how little LS is. I'm not saying that she may not have wanted more, at some point, but physically, how was she capable of going out to get it? This thought is in reference to Northsider's comments about her maybe going to a DD's house and ODing. The only way I do wonder if someone OFFERED her more, is if some of her friends believed that some more coke would contradict the effects of the Xanex. That's an entirely possible idea, and if true, it would give more reason to them wanting to hide her body. I think that even in their own minds, they could be justifying what they did. They may have been trying to "help" her in the only way they knew how - to contradict one drug's effect on her body. Very scary to play Doctor.