The first hand was just feel - a set, two pair and a combo draw are such a big part of his range, bearing in mind a decentish player making such a small re-raise - that I couldn't face stacking off with a pair of queens. And had I called or raised his flop bet, meh. I also think it was weak but every alarm bell imaginable is ringing here.

Hand 2, I never seriously considered folding as the hands he might have that are ahead here are such a small part of his range, assuming he's a regular unknown. Fair?

Hand 3 is probably the most dubious of the 3. I knew at this point he was maniacal pre-flop and very aggro on the flop; I took a risk that he could also fold a poor or whiffed hand to a 3/4 pot turn bet. I don't think I'm wrong... but maybe this wasn't such a great flop to do it on.