A couple of hands I don't like.

1) Villain is 17/8/2.5 over small sample. No reads.

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($52.45)
Button ($50)
SB ($51.75)
BB ($50)
UTG ($30.05)

Preflop: Hero is MP with Ahttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Ahttp://www.flopturnriver.com/phpBB2/...miles/club.gif.
1 fold, Hero raises to $2, 2 folds, BB calls $1.50.

Flop: ($4.25) Jhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Khttp://www.flopturnriver.com/phpBB2/...miles/club.gif, 3http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
BB checks, Hero bets $3, BB raises to $8.5, Hero calls $5.50.

Turn: ($21.25) Thttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
BB checks, Hero bets $17

2)Villain is 33/20/2.75
Should I be raising the flop here or donking into him?

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

SB ($54.75)
Hero ($49.75)
UTG ($46.70)
MP ($46.05)
CO ($49.75)
Button ($48.75)

Preflop: Hero is BB with http://www.flopturnriver.com/phpBB2/.../smiles/ks.gif, http://www.flopturnriver.com/phpBB2/.../smiles/qd.gif.
3 folds, Button raises to $2, 1 fold, Hero calls $1.50.

Flop: ($4.25) http://www.flopturnriver.com/phpBB2/.../smiles/8h.gif, http://www.flopturnriver.com/phpBB2/.../smiles/qc.gif, http://www.flopturnriver.com/phpBB2/.../smiles/9h.gif (2 players)
Hero checks, Button bets $4, Hero calls $4.

Turn: ($12.25) http://www.flopturnriver.com/phpBB2/.../smiles/tc.gif (2 players)
Hero bets $8, Button raises to $42, Hero folds.

Final Pot: $28.25

Hand 1: I don't see him raising a set on the flop, I'm stack off here thinking he has ak, qk, aj, aq or air. The best of those (aq), he doesn't have the odds to call. If he has kj I'm paying him off, but since you have no reads I assume he isn't likely to be playing back at you with no history.

Hand 2: I'd definately bet the flop for value.