I think you played hand 1 well and I think you have good reasoning behind it. I think river is check-call.

Hand 2 looks good too.

What do you normally make of people leading out for a minbet, today i saw it be a monster, a draw, and complete air?
Yeah... it can be all of the above. That's why it's important to note what hands people are doing it with. Also note how they react to their donk leads being raised.

Hand 3. I fold to the 3-bet on the flop. I like the raise, but I don't think many people are 3-betting with a range you're ahead of.