It's NANO time!

This NaNo season my daughter and I are exchanging character sketches. The sketch we get has to be the main character of the story. A simple challenge.
I gave her a woman about the same age as she is, who is a celebrity photog. Meaning she chases celebrities for the best shot. Have fun with that! :)
I think I'm so smart.
So what does she give me?
A 12 year old girl genius. The kids a college student. A 12 year old college student!
Oy!
Its going to be a long NaNo...

So tell me? Do you NaNo and what's your biggest writing challenge?