Hand 1:
Why cap with KQo against a solid player who 3-bet you? He's more than likely ahead of you now. Since you capped it... I think you played it fine post-flop. Alternatively you could have bet/folded the river.

Hand 2:
Slightly loose BB call with only two callers, but I'm sure others here would disagree with me. Good check-raise on the flop - don't worry about losing flush over flush. It's unlikely to lose flush over flush. If you led out with a bet, he often would make the field face two bets cold... the C/R gives you the best chance of keeping others in the hand and putting money in the pot.

Him checking the turn was odd... maybe he has QQ, KK, or KJ? That or he was way overplaying a flush draw on the flop.

There's very few hands you can beat here given the pre-flop and flop action, so I'd probably give it up on the river. However, that turn check really makes me think about bet-folding the river.