NL100 6max - Flop decision with AA

[Coiote]

Villain is 30/4/1 over 200 hands with a flop aggression of 1.5

This is a spot where i normally have some troubles playing against these kind of players.

Full Tilt No-Limit Hold'em, $1 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

Button ($98)
SB ($97.50)
BB ($205.80)
UTG ($105.70)
MP ($158.25)
Hero ($195.50)

Preflop: Hero is CO with , .
UTG calls $1, 1 fold</font>, <font color="red">Hero raises to $5</font>, 2 folds, BB calls $4, UTG calls $4.

Flop: ($15.50) , , (3 players)
BB checks, UTG bets $15.5