Hand 1: I play it the same way. If he got 2 pair, so be it.

Hand 2: I take the free card on the flop here 50% of the time. All I got is a gutshot draw and one overcard and I think it's likely he have a K or Q. Depending on reads it either a check or bet. But since you said tricky I check behind. Now that he CR you, I fold 50% of the time on the flop and if I go unimproved I fold on the turn if I decide to call.

Hand 3: Nice hand. I like it alot. Nice river bet.