I like the first one but it's a tough spot for sure. Party $25 is a contradiction... it's about going to the felt with overpairs and laying them down... it's about pushing with AQ and mucking AK. There's such a vast difference in the playing styles of the different players that you always have to have your eyes open.

On the third one you have 15 chances to win (I will ignore your A and 8 outs). The pot is $88 and it's $38 to call, giving you 2.3:1 odds (I think). You have a 33% chance of winning, I think this call is almost exactly break even, note if he has a set then it's probably - EV, if your ace outs are good it's probably + EV. If he has 89 you are screwd :P I would probably fold.