I'm assuming these hands are on Pokerroom. And with that in mind I base my answers on the 100NL I usually play which is very loose passive in general.

Hand #1: I play the same except I fold to the push. What worse is someone value pushing here? The only semi-bluff that would make sense is AJhh, but I don't give villains credit to do this unless I have seen them do it.

Hand #2: I always get AK in preflop against half-stacks unless they have been sitting quiet giving no action for a very long peroid of time.

Hand #3: Like I said already, I don't like this one. I've found SC bets preflop are generally in a min-raise, not this weird bet. I like set hunting with PPs on this site against someone playing like this anyway, you'll get their stack if you hit.

Hand #4: I reraise preflop. I also don't like c/r'ing air. They get called a LOT on this site with total garbage. I've been called down with trash too much when I take a c/r line on the flop. I'd rather c/f flop.

Hand #5: Once he calls your flop bet give up since your read is that he's a nit. *Incidently, from what I know of this guy, he's kinda nitty pre-flop, but very aggressive post flop. Not too sure how he is in 3-bet pots, he could do this with 88-99 but I doubt it. Definately overvalues his hands.

Hand #6: I prefer to bet but a check makes sense too. Knowing him, I definately bet. He stacked off with TT on a QQx flop that I've seen.

Hand #7: Spew, I don't like trying to make them fold. It sucks when you know what they have but still know you can't make them fold it.