Both these hands are against the same OP on different tables, I think he is regular. He runs like 27/18/1.5 after 300 hands.
His biggest leak as far as I remember is low turn aggression.

Hand1. I was experimenting with abusing the button and run like 45/25 OTB, hence a smaller raise. Thoughts? Suggestions? Who raises turn? May be a bigger VB on the river?

Seat 5: Ty . Biggums ($906.05 in chips)
Seat 6: Hero ($470.80 in chips)
Seat 7: G0ldFing3r ($387.00 in chips)
ANTES/BLINDS
G0ldFing3r posts blind ($2), Ty . Biggums posts blind ($4).

PRE-FLOP
Hero bets $11, G0ldFing3r folds, Ty . Biggums calls $7.

FLOP
Ty . Biggums bets $24, Hero calls $24.

TURN
Ty . Biggums bets $51, Hero calls $51.

RIVER
Ty . Biggums checks, Hero bets $77


Hand2. Here I thought about 3 betting flop, but I felt that we weren't deep enough to do so. When he checked turn I suspected that he tried to play back on flop and decided that I can take it on turn.

Seat 4: s_malby ($625.40 in chips)
Seat 5: Ty . Biggums ($881.80 in chips)
Seat 6: Hero ($406.00 in chips)
Seat 7: VHEoS ($400.00 in chips)
Seat 8: Trauma666 ($752.45 in chips)
ANTES/BLINDS
s_malby posts blind ($2), Ty . Biggums posts blind ($4).

PRE-FLOP
Hero bets $14, VHEoS folds, Trauma666 folds, s_malby folds, Ty . Biggums calls $10.

FLOP
Ty . Biggums checks, Hero bets $22, Ty . Biggums bets $65, Hero calls $43.

TURN
Ty . Biggums checks, Hero bets $111

Hand #1- I play a lot 3-4 handed and you can raise small before the flop, but I still like 3-3.5x OTB 3-handed.

This is a guy who shuts down a lot. When he bets this turn, I salivate and tell myself I got action and make a raise to $125-$150. You give him less than 3:1 to make a bad call if he knew your cards and he usually doesn't have a spade draw, but a Jack. He re-raises you PF with the big-card/straight draws and you have a 9, it's 3-handed, he led the flop- he doesn't have the straight. I'd say QJ at best to call another $85. and you can push the river and stack a Jack. TP is a monster here and maybe you can rope in a Ten. I prefer raising to ~$130

As you played the turn, I like the river. I still have him on QJ/J9/J8 or T9 at worst.

I don't mind how you played it. i just think you lost the value of looser calls in SH play.

Hand #2- Potting the flop is good. This is a great flop for you, but if you've been aggressive, he's gonna CR and float light. The flop call is fine. You have position on a guy who shuts down on the turn with regularity. I take the free river here.

I think for the first hand you gotta raise the turn (despite his low turn aggression which indicates he has a decently strong hand if he bets the turn), 160-180.

As played, I would bet 140 on the river.

Second hand, check behind...low turn aggression no? Just because he checks the turn doesn't mean he doesn't have a hand here. You have a good draw, you could backdoor him, i'd take off a freebie.

Hand 1) I raise the turn for sure since there are lots of scare cards that kill action and your hand is presently very disguised.

Hand 2) I'm torn. He has low flop agression so a flop CR does scare me a bit. However, after he checks the turn, I'm more inclined to the think he has A[d] K[d]. Will he fold that to your turn bet???