Table was playing loose and generally stupid. Every pot was 5-6 ways, and most people were adjusting their bet sizing to match their hand strength.
100BB starting stack, blinds double every 20 mins.

Hand #1:
I didn't play a hand for the first two orbits, and my image is super nitty. However, I don't think many other players are paying attention to my image. Villain has been involved in a lot of pots, middle-aged man who plays both highly aggressive and highly straightforward.
4 folds, villain raises to 150 from CO. I flat A2o OTB (his range is really wide here, I think I can pot control if I spike an ace / get paid off one street, and I think I can profitably bluff-raise a lot of low flops and take it down. I know this play is unconventional, but this player is probably the only one who might consider my image and shut down). Both the blinds call, flop comes down 4 ways.

1) How spewy is this call, given the action and the fact that blinds can come along cheaply? Should I be 3-betting if I'm going to play this as a bluff to keep the blinds out and avoid getting into a multi-way pot?

2) What do you 3-bet here given your current image?

Flop comes Q72, villain bets 500 into 600 and I snap-fold.

Hand #2:
I have AJss UTG in 50/100, and I have 4.8k stacks. All villains cover. I raise to 300, and get two calls from MP and a call from the BB. BB thinks for about 3-5 seconds before calling.

Flop: JT9s. (1250) Checked to me, I tank and check. I am checking for pot control and because I think combo draws/pairs never fold, and I'll just be building a big pot OOP with a ton of cards to come that I won't know where I stand. Both MP players check through.
Turn: offsuit 9. EP player instantly bets out 600. I tank again, and elect to call (again, I think I made a mistake by calling here. Both the MP players are making motions like they will fold, so I know I'll have the pot HU. I think that there are some pair+combo draws that bet here (QT,QJ,Q9,J8,A8,AQ), and a lot of 9 hands. I'm now debating whether villain tanked to consider a reraise, or tanked to consider calling for implied odds.
River: A (2450). Villain quickly checks, and I bet 600. I bet this much because I think I get called by a lot of Jx combo draw hands, and any A8/AQ that just binked off top pair.

Hand #3: I have 3400 w/ AKs UTG in 100/200. 10 mins til 200/400. I raise to 600, get flatted from the button (10k), and BB snap-shoves 8k. BB is the straightforward aggro villain from 1st hand. I know you will all call me a nit here, but I think this is pretty close. I think he would have an "oh **** I have aces here, how do I maximize value" moment with AA and be less likely to SNAP shove, but it's def in his range. KK is the most likely holding, with QQ/AK possible. Do you all snap-call here? (I made the call, but I'm debating about it after the fact. Live players are nits, and when a nitty middle-aged man shoves a good stack into a flat from the button, I think his range is insanely strong)

1) fold...no need to try to outplay idiots at this stage...it bleeds chips and puts you in akward spots cause we realy have no idea what they may have or may do

2) I think all this becomes easier if we just bet the flop. Turn are you IP? so the bettor was a blind? call is iffy. Don't love the river bet...are you calling a c/r? If you think you are best why not raise more?

3) You are being a results oriented nit...you cannot do anything but shove your chips in here with your stack and that hand...I mean what better spot are you going to hold out for????????

Depends on stacks which I cannot see but usually TT+ (99 not sure but flat at least along with 88, flatting lower pps must have some calculations behind for good setmining odds which seems to be the case here)

, AJs+, AQo+. KQ, maybe QJs+ and some scs down the line for me.