I'm not sure about the other characters. Teyla's is bound up with the preservation of the Athosians, I think, but as I said. *shrugs*
What motivations/core essences do you see driving/defining the various characters? Particularly through season one?
In related matters, I think I'm doing NaNoWriMo this year, but instead of starting yet another novel that won't make it past a couple thousand words, I'm going to work on plowing through Things Already Seen. Which is technically against the rules, but I'm not planning on claiming victory or whatever--I just want to get this thing written, and I'm hoping NaNo might help me stay focused. Give me a writing schedule, that kind of thing. Here's hoping, because I'm tired of having stuff just sit and stare at me.