Here are a few hands from tonights session. They are all from 10NL. Any comments or advice on these hands?

Hand #1- Villian seems somewhat of a donkey, and was overbetting the pot quite a lot at my other table. Unfortunately he hadn't shown down any of these overbets yet.

I get dealt :Kh: :Jh: from the CO seat and raise to $0.40. Folds around to the big blind who calls.

Flop comes :Qh:

BB leads out for $0.60 and I smooth call. This is a great flop for me and while I could raise in this position, I decided not to since I didn't feel I wouldn't get called by many hands.

Turn is dealt

BB leads for $0.80 and I call again. After reflecting on this hand I felt that I should've raised the turn here. However at this point I do not believe he has the ace of hearts here, basically because I feel he would have checked the turn hoping for a free card.

River is dealt

BB pushes all in for $6.45. Well not the best river card as I have just fallen behind a set. His bet scared the shit out of me and it took me a long time before I made up my mind.

Hand #2
Villain has been playing tight passive for the time I was at the table. I had only been at the table 15 minutes however. Should I slow down in this spot?

2 limpers, SB completes and I check from the BB with :Ac:

Flop is dealt :Jc: :Tc:

SB leads out for $0.40. I raise to $1.20. Everybody folds. My reasoning for making this play was that the way SB was playing I didn't think he would bet anything less than a pair of jacks here, and I'm pretty sure he would check/call a draw. Is there a better way to maximize value here?

Hand#3

Villain has been playing very tight, and I have a good read on him that he overbets with strong hands and underbets with weak ones.

I'm UTG with and limp in. It's folded to the button who makes it $0.30 to go, SB calls, BB folds. I call as well.

Flop comes out :Ac: :Qh:
SB checks. I check. Button bets $0.50. SB folds. I raise to $1.25. Button calls $0.75.

Turn is dealt :Ah:
I bet $1.50. Button calls.

River is dealt :Jh:
I bet $2. Button raises all in for $5.95. Is there any way you can find a fold here? At this point I knew he had a strong hand, but with 4 hearts on the board does he make this bet with a flush as well?