Hand 1 - C-bet this flop. Your check on the flop tells him that you missed the flop. If you are willing to call his bet you may as well lead out and put the pressure on him. If you had bet the flop you could then bet the turn. As played did he just call your bet on the river? If so, that was a bad play on HIS part.

Hand 2 - you want to know how you could have gotten more out of this hand? The answer is to bet more. I make it $1 to go on the flop and if they both call that make it $3 to go on the turn. If they are as aggressive as you say that are they will call if they hit ANY part of that flop.

Hand 3 - Why is your turn bet smaller than your flop bet? make it $1.50 to go on the turn. Your hand is vulnerable so you should be happy to take it down right there. As played did you call his all-in? Barring a solid read that he is ultra tight I would call here because in many cases you are ahead and even if you aren't you have 10 outs to improve to a full house.