[Hack]

Hand 1:

Fold. You got no part of this flop and 2 of your 6 pair outs are dirty because they are spades.

Hand 2:

Bet this. It's heads up and you probably still have the best hand although he could have a pair higher than yours from the flop and is playing passively.

Hand 3:

Raise here. He checked the flop through so a queen is unlikely- even more so when a second queen came on the river. I put him on a ten and you have the best kicker with your ten so I raise here. If he 3-bets I probably fold, but maybe an argument could be made for calling it down. I think this one is really read-dependent. If he is a loose aggressive player I think I definitely call it down. If he is passive and 3bets it's an easy fold.