hand 1: tough decisions like these are teh rock. i suppose you're agonizing over which move gets the stack and which one gets him off the hand. since you are SO far ahead here, i think a call is in order. he is obviously feeling frisky and there is a good chance he'll continue on the turn for another large bet. give him a chance to make is 666xx boat or worse AKd flush, while at the same time giving him room/more rope to try to fix the mistake from the OOP flop bet with another overbet to cover up.

hand 2: raise it up in position w/ two overs and the nut flush draw on the flop. let's say he's got a pair between your A8 like red 10-10:

http://twodimes.net/h/?z=1629136
pokenum -h ac 8c - td th -- 2c 3c 4s
Holdem Hi: 990 enumerated boards containing 4s 3c 2c
cards win %win lose %lose tie %tie EV
Ac 8c 524 52.93 448 45.25 18 1.82 0.538
Td Th 448 45.25 524 52.93 18 1.82 0.462

that's right, you're ahead since you can also nab a 5 to stay alive. since you're in position, so use it to throw some weight around here. you might get a fold, which would require the least amount of effort for your A8c to catch up (none).

hand 3: tough one, he makes a really nice bet OOP on the turn there considering he'd be looking at the river pot size of nearly $375 w/ only $250ish left at that point if you just call, good enough odds to just push (some call this pot committment, so be careful he can make a bad push with a slightly better hand if you don't improve). feels like he's putting you to the test here with that bet, or he assumes you're going over him and he's ahead. judgment call, what was your first instinct here? you can have an instinct reaction w/o a read or any time at the table, that is allowed. i think this is the toughest decision of the 4 hands, btw.

hand 4: wow, big stacks for this situation make it really interesting. i really want to find out you got it all there and then flexed like the hulkster upon receiving the shipment. raise it between 2.5-3x his raise, he's bound to at least call that w/ AA , KK, QQ and then you're still in position after he checks the turn to you with pee running down his leg, or pushes into you while far behind, barring a miracle 2 outer.

were you thinking about smooth calling here? that board is teh rags, so i could see how you'd be tempted. thing is, it's SOOOO tough to sell a draw on that board, what did you call a PFRR w/ 45 suited? sometimes we do, but not often enough for players to think they have to notice something like that. accordingly, i think you have to go fast here.