I love it.
I love that she frequently, unabashedly proclaims, "I don't know what that means," usually referring to some apparently obvious pop culture allusion.
I love how, at that point in episode where everyone is going with their gut feeling, where normally I would yell at the screen, "But you have no evidence for that!" I don't get the chance, because she scolds the offending character saying, "But that is just conjecture! You have no hard facts!"
In a recent episode, her friend was unburdening herself of her romantic woes, and wondering, "What if that was The One"? What if I just missed my chance?" Dr. Brennan responded using the usual comforting noises one would expect, "You'll get another chance, you'll find someone else." Her friend demanded, "But how do you know that?"
Dr. Brennon's impassioned response was, "I know because nothing in this universe is unique."
It brought a tear to my eye.
Oh, also, she kicks people's ass a lot. That's always hot.