87o - It's folded to you and you have 87o in the SB, BB is 68/15/1.8 and you fold. I would raise.

K6o - You bet a 864 (two spades) flop, UTG calls, button raises, you call and fold turn UI. I find these hands difficult to play, sometimes I check and see what happens, raising a bet from late position. Sometimes I play it the way you did, but I think I call this one down. Villain is 44/14/1.8 and could be raising his draw here.

54o - You have 54o in the BB, UTG raises, MP coldcalls and you allready click the fold button. I would call here or atleast wait if you get more CC's in front of you.

AKs - You bet a QJ9r flop after raising pf HU. Turn 8, you bet. I would check/call this turn. You don't have the best hand here enough to make this bet +EV imo.

QJo - I would check/fold the river.