Bloated pot with AA

For some reason I always get nervous in these situations, thinking the caller is looking for bad implied odds with the preflop call and could have TT, 66 or 33 after the flop flat call. Is shutting down postflop losing far too much value even on this board? Without a read on villain here the texture feels like a set... if I bet any further I'm committing everything, but i guess with the preflop raise i am playing a big pot regardless.

-----HAND 2------
Game #2702254954: Hold'em NL (£0.15/£0.25) - 2006/06/15 - 21:07:40 (UK)
Table "Ronador" Seat 9 is the button.
Seat 1: Balage (£22 in chips)
Seat 2: mueller sits out
Seat 3: Arturo79 (£23.45 in chips)
Seat 4: BigAl88 (£37.21 in chips)
Seat 5: Scorpion5 (£32.75 in chips)
Seat 6: Tammmm (£18.65 in chips)
Seat 7: Smiffy44 (£24.60 in chips)
Seat 8: pokerbank (£25 in chips)
Seat 9: roadkill (£32.60 in chips)
Seat 10: Pharaoh_ (£25.61 in chips)
Pharaoh_: posts small blind £0.15
Balage: posts big blind £0.25
pokerbank: posts big blind £0.25
----- HOLE CARDS -----
dealt to Smiffy44 [Ac Ad]
Arturo79: calls £0.25
BigAl88: calls £0.25
Scorpion5: folds
Tammmm: folds
Smiffy44: raises to £3
pokerbank: folds
roadkill: folds
Pharaoh_: folds
Balage: folds
Arturo79: folds
BigAl88: calls £2.75
----- FLOP ----- [6c 3c Td]
BigAl88: checks
Smiffy44: bets £5
BigAl88: calls £5
----- TURN ----- [6c 3c Td][9d]
BigAl88: checks
Smiffy44: checks
----- RIVER ----- [6c 3c Td 9d][7d]
BigAl88: checks
Smiffy44: checks

I stick the rest in on the turn.

1. Raise to 2.00 pre-flop, 3 is just unnecessary. Why use the sledgehammer when a regular hammer will get it done? And unless 3.00 is your standard raise, this looks like a clear "I have a big pair" signal.

2. High enough likelihood of a draw (the flush) or lower pair (tens) that I'm betting that turn.

3. If you don't bet the turn, you should probably bet after he checks that river. You have the Ad and it's dubious in any event that he would have hit a runner-runner flush, since the highest card on the flop was the diamond; the only hands I can see worrying about are 88 or 89. Scary board but I value bet anyway, probably 7.00, and fold to a push.