Hand 1: No reads on villain, just sat down.

$0.1/$0.25 No Limit Holdem
6 players
Converted at

Stacks:
UTG ($18.20)
UTG+1 ($27.10)
CO ($12.65)
BTN ($15.10)
SB ($25.70)
Hero ($25.50)

Pre-flop: ($0.35, 6 players) Hero is BB [Ks]
UTG calls $0.25, 3 folds, SB calls $0.15, Hero raises to $1.25, UTG folds, SB calls $1

Flop: [8h][Td] ($2.75, 2 players)
SB checks, Hero bets $2, SB raises to $4, Hero calls $2

Turn: ($10.75, 2 players)
SB goes all-in $20.45, Hero ???

Hand 2: Villain is 42/21/1.5 over 24 hands

$0.1/$0.25 No Limit Holdem
6 players
Converted at

Stacks:
UTG ($19.00)
UTG+1 ($28.70)
CO ($44.40)
Hero ($40.10)
SB ($14.15)
BB ($9.45)

Pre-flop: ($0.35, 6 players) Hero is BTN [Ks]
1 fold, UTG+1 calls $0.25, 1 fold, Hero raises to $1.1, 2 folds, UTG+1 calls $0.85

Flop: [9h][4c] ($2.55, 2 players)
UTG+1 checks, Hero bets $2, UTG+1 calls $2

Turn: ($6.55, 2 players)
UTG+1 checks, Hero bets $4.5, UTG+1 calls $4.5

River: ($15.55, 2 players)
UTG+1 checks, Hero bets $11, UTG+1 goes all-in $21.1, Hero ???

Another KK hand:

$0.1/$0.25 No Limit Holdem
6 players
Converted at

Stacks:
UTG ($56.65)
UTG+1 ($60.85)
Hero ($38.50)
BTN ($25.00)
SB ($45.25)
BB ($25.65)

Pre-flop: ($0.35, 6 players) Hero is CO [Ks]
1 fold, UTG+1 raises to $1, Hero raises to $3.5, 3 folds, UTG+1 calls $2.5

Flop: [8d][6d] ($7.35, 2 players)
UTG+1 bets $4, Hero raises to $14, UTG+1 folds

Final Pot: $15.35

Hero wins $24.6 ( won +$7.1 )
UTG+1 lost -$7.50

Agree with Twelver hands 1 and 2.

Hand 3: I like the flop raise obv, perhaps make it even larger.

Hand 1 I snap called and went broke to 98o
Hand 2 I didn't really know what he had. I felt he was slowplaying a set or something as I had been playing quite aggressively. I ended up going broke to 64s

Why overbet? So he can fold his hands that we have great equity against?

Hand 1 I call, Hand 2 I call but hate myself afterwards, Hand 3 is nice.