I don't know how I feel about O'Brien. On the one hand, I trust that he knows how to run a full program. On the other hand, he reminds me a lot of Marrone - conservative approach, never really pushes the envelope. Sometimes he's aggressive on fourth downs and other times he's maddeningly Marrone-like, punting from a short field, down a TD with a few minutes to go. I don't know... like Marrone, his team is usually competitive but never dominant.