Out of all the characters in the show, she and Claire are the worst by far.
Claire videotapes trying to kill herself, and then tries to pretend that she's normal. If you're trying to be a "normal" teenager, recording evidence that you're anything but normal, and then skulking about it, are two strides in the opposite direction. It almost renders everything Bennet is doing null and void, besides the fact that he's having her killed, because you know she'd just mope around and be ungrateful anyways.
I really don't see why everyone is so hot for Ali Larter. Seriously. The scrappy blonde look just doesn't do it for me. Add to that, she's obviously not conflicted about screwing other people over, whether she's in control or "Jessica" is, and is as self-absorbed and self-destructive as Claire. It makes her nigh impossible to root for, and I strongly believe that unless there's some unforseen turnaround at the fifteenth episode (or so), she's going to be a villain. DL on the other hand, who she is quick to demonize, has been nothing but a sympathetic character.
What with more Powers showing up, Micah being a technopath, the waitress being a cipher/walking Rosetta Stone, and Eden, who, regardless of being good or evil, is gorgeous, being an empath (of sorts), Claire and Niki are becoming less and less likeable, as we're meeting more and more people who are.