KJs agaisnt PF raiser and AA vs. check raise

[kman]

Hand 1
Is there any way I could get away from this? Villain is 40/20 over 30 hands and is somewhat passive post flop.

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($47.95)
Button ($24.30)
SB ($23.95)
Hero ($26.30)
UTG ($37.35)

Preflop: Hero is BB with K, J.
UTG raises to $1, MP calls $1, Button calls $1, SB calls $0.90, Hero calls $0.75.

Flop: ($5) 7, J, 8 (5 players)
SB checks, Hero checks, UTG bets $3, MP folds, Button folds, SB folds, Hero calls $3.

Turn: ($11) K (2 players)
Hero bets $7, UTG raises to $27.25, Hero calls $15.30 (All-In).

River: ($55.60) 8 (2 players, 1 all-in)

Final Pot: $55.60

Hand 2

Villain is 18/12 over 35 hands. Should I have just called the check raise on the flop. Any suggestions would be helpful.

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($25)
Button ($9.55)
SB ($19.15)
BB ($37.30)
Hero ($24.50)

Preflop: Hero is UTG with A, A. MP posts a blind of $0.25.
Hero raises to $1, 2 folds, SB calls $0.90, 1 fold.

Flop: ($2.50) 4, Q, 9 (2 players)
SB checks, Hero bets $1.5, SB raises to $5, Hero raises to $8.5, SB raises to $18.15, Hero calls $9.65.

Turn: ($38.80) 6 (2 players)

River: ($38.80) 8 (2 players)

Final Pot: $38.80

[Harry]

Hand 1 is fine.

Hand 2, an 18/12 cold calling and then c/r a dry flop like that is usually a set. This is obviously the case since you are posting the hand, but you shouldn't feel t oo bad about getting it in there. JT and AQ are also possibilities.

[Galapogos]

Hand #1: Standard.

Hand #2: This looks so much like a set. If villain is not very aggressive or active I actually fold to the huge c/r because he means business. If you do want to play for stacks, however, you're better off calling him down to allow him to continue bluffing rather than reraising and scaring out worse hands.