re: Poker & Hand Analysis Please on this hand
Folding was the right thing to do. He either had KK or a straight draw with J10 and his betting is evident of this. I would have folded the river too, and decisions like that are very heartbreaking, especially with a set of queens. Judging from your details it shows that mercenary didn't raise pre-flop, so doubtful he did have them KK's, and limping with a J10 would seem reasonable and his betting made sense.
The second hand was really well played. I wouldn't have played it any differently really. You won the hand and probably got the most money out of your opponent.