The death of DL was obvious how DS said it. The powers need to be switched on. It was just to sudden. As for Nikki, I hate her whiny character. Only the parts in which she acts like murdering bitch are cool.
As for Adam, told you I liked him, I even like him better now. To me it seems that he isn't THAT bad, he just is very impulsive. I mean he dubble crossed Hiro when he was in an emotional disturbed state. Maybe he really does want to help humankind. Anyways, I don't really care. I like his character.
And not to mention Elle, I allready thought she was hot. But that "sadistic" behaviour of her is just sexy. Milo should be thankfull for the writers

. Electrokynese is my type of power anyways

. Love them all together.
As for Peter, I always liked his character and I still do. I think this was a VERY good episode.
Edit: I hate those Mexicans even more now. Please Sylar, kill them for me.