Hand #1)

I have no read on CO, just sat down. He has 120BB (yeah I doubled up in the first few hands here).

1. CO min-raises to $2, I 3-bet to $7.50 with [Jc] from the SB, CO calls.
2. Flop [5h][3d], pot $16, I bet $10.50 and CO calls.
3. Turn , pot $37. What's my line?

I think I know the answer to this now but I didn't in the 30 seconds I had, but just want to check.

Hand #2)

Villain is 29/21 and we're both full stacked.
1. Villain limps UTG, I raise to $4.50 from the button with [Tc], villain calls.
2. Flop [4s][2s], pot $10. Villain checks I bet $8, villain calls.
3. Turn , pot $26. Villain leads $12, I shove for about $70 more.

Hand #3

No reads, full stacks.

1. I open from the CO with [3c], only BB calls.
2. Flop [6c][4h], pot $7.5. Villain checks, I bet $6.25, villain raises to $20, I shove.

I'm assuming this is super standard, but I do tend to overplay my draws.

Hand 1: I either B/F or C/F. We are usually only in front of 66-88 on turn and high hearths that floated have great equity vs us. My personal preference is to bet 10bb preflop and 75% on this flop vs unknowns. Its a ugly flop and there are 20 cards in the deck that you don't want to see. This is not one of the flops where you want him to float you with overcards since you are OOP and readless.

Hand2: I hate making big time bluffs. Hard to incorporate into my game vs regs since they seem nitty and have a good hand way too often and fish do what fish do best, call :/
Hand3:
Omg..I hate this software sometimes. I wrote like 50 sentences and all got deleted.
So this will be a shorter one. I like actually calling more in hand3:. Some will say that my line sucks but
a) He CR you quite big. He is not going unless anywhere unless its a total bluff. So you are turning a positive EV situation into a neutral one at best by showing here. Your FE seems small and is not the best way to maximize your gain here.
B) We have something like 2:5:1 or in other words we need 30% equity to call. We are close to it. We can assume that he will not be able to get away from a set or 2 pair if we hit and if we milk him properly. I suggest doing this only in position since if we are oop, villains are more likely to raise our lead and our FE is greater(Most opponents raise my CB about 20% of time while CR only 5% of time)
C) If he has a weak Qx he will most likely check turn and then K, 3, 5,2, give us additional bluffing possibility and we can make him fold. It will be really hard for him to bet turn there without a set and well..If he had set we were behind by 3:1 and didn't let him make
50$ sklansky bucks or whatever by our flop push. We made a small -ev cal on flop with what is most likely huge implied odds.
I prefer playing poker over mindless pushing my chips. This obviously is only a line you should take vs non regs. Regs will obviously easily exploit this but a guy that plays less than 500 hands with you will not be able to pick up this line vs you.
I wanna hear what ppl think of my line in hand3

Well, here are my thoughts.

Hand #1) I don't like leading, as I think if he did float me with [Ks] or something he can shove the turn and I have to fold. The 9 also quite likely gave him a set on the turn. I did C/F, but the more I think about it the more I like a c/c hoping 44/66/77/88 takea stab at it and the river bricks out.

Hand #2: What can seriously call here other than 44? And I just don't see him check/calling a semi-drawy flop oop with 44 or leading suddenly when he boats up. I've been trying to improve my game by finding good spots to bluff, and I think this is one (and having 6 outs helps greatly as well).

Hand #3) I'm personally fine with either shoving or calling here. His smooth call out of the blinds means it's 44/66 a lot I think (as does his strong check-raise), but he can also have some sort of straight or flush draw that will blast me off the turn if I just call (and occasionally call my flop shove and be way behind)