Hand 1: I fold preflop, A2o is a hand that can really get you into trouble multi-way, you've really only got a chance if you flop 2 pair or trips/straight (which happens in total like 3% of the time). As played, I probably get really unhappy and fold the river. I like flop and turn play though.

Hand 2: You have to lead the turn imo for information, as played calling the river is fine.

Hand 3: RAISE PREFLOP!!!!!!!!!!!!!!! As played its ok I think.