Re: Super Dave
I really enjoy Super Dave.  He's the "everyman" or the calm before the storm, and he contributes a lot to the personality of the show.  Sweet, calm Dave.  You can just tell that he came from a good, loving family, and he's so respectful of his bosses, including that badass Ecklie.
I also like the little glimpses we've gotten into his personal life.  Yes, he announced that he was engaged back in season 5.  I wonder if he ever got married?  Also, he's an Air Force brat as he stated that his father is an active duty Colonel.  Dad must hold a pretty top secret position at Nellis AFB if he's in charge of those spy or weather satellites.
He's one character actor I definitely want to stay with the show.