Tough one. Perhaps the villain was trying to isolate the player that limped in? Did you consider putting in a re-raise. Folding seems reasonable too, as there is still action behind you.
Another tough one in Hand #2. The villain had $120 to start, so after he comes in for a raise on the BTN, I kind of like jamming out of the BB with AQo. The limper is most likely weak, and the villain could be trying to steal on the BTN. At least you got him to put his money in bad.
As far as Hand #3 goes. Eliminate QJo from your range UTG +1. If you feel the need to play a hand like this, come in for a raise. Why did you lead for all of your chips on the flop? It worked, as the villain called off with only 4% equity. The runout was disgusting to say the least.