While I like the idea of Tarantino directing, I really dislike that some people will be watching JUST because he's directing. It seems like such a fanboy thing to do.
Bruckheimer should direct an episode, too.
Oh and DH, here is some background info on each character:
Grissom: work > personal life
Catherine: ex-stripper, dead husband
Warrick: gambling addict
Nick: sexually abused as a child
Sarah: alcoholic, mom killed dad