[bozzer]

hand one looks semi standard. you could of course fold pre or on the flop. 4bet might not be a bad idea but you'll probably feel pretty meh if he shoves.

hand two if i check i check/fold i don't mind a weakish cbet/fold though - chances are pairs aren't as much of his range as a normal 3b situation.

EDIT: actually on closer inspection of OP's reads i'd be favour calling pre (i think we have odds) and not floating.

just remember that unless he's 3betting 1/3 of your btn raises and you are folding every time you are making money, so you don't have to play back to make money.