Big draws in big pots question

[NWCougar]

Typical SH game
My concern is the flop. I've been having a problem getting aggressive with my draws, is this flop where I should start pumping or should I just let my opponants do it for me?

Cryptologic
Limit Holdem Ring game
5 players

Pre-flop: (5 players) Hero is UTG with
Hero calls (1.5:1), CO raises, Button calls, SB 3-bets, BB caps, Hero calls (10.5:3), CO calls, Button calls, SB calls.

Flop: (15SB, 5 players)
SB checks, BB checks, Hero checks, CO checks, Button bets, SB raises, BB 3-bets, Hero calls (21:3), CO folds, Button caps, SB calls, BB calls, Hero calls (30:1).

Turn: (15.5BB, 4 players)
SB checks, BB checks, Hero checks, Button bets, SB folds, BB calls, Hero raises, Button calls, BB calls.

River: (21.5BB, 3 players)
BB checks, Hero bets, Button calls, BB folds.

Results:
Final pot: 23.5BB
Hero shows 3d Ad
Button mucks Ts Jd

[Derk]

[Danhdan]

Well I don't like the PF, and on the flop you should be betting out hoping to get raised here. I don't mind being the person to cap the hand either because it's harder for them to put you on the flush when you cap the flop or bet at it. This is a flop which probably hits a couple of your opponents and being aggressive before you hit your hand with the small bets rather than when you make the flush on the turn might get an extra big bet or two later on in the hand. Sometimes people will just figure you capped because you "knew it was going to happen anyway.

With the way the betting went PF and on the flop, when you wake up on the turn, it's painfully obvious you have the flush, and your opponents seemed to know it too. Did the button have a set or the straight...my money would be on the straight.

[Derk]

[The Golden 1]

Ugh to the original preflop call, UGGGGHHHHH to the call of the cap. UGGHH to not leading the flop, UGH to not capping the flop. You cap flop and there's no way he puts you on the flush when you lead turn and more bets for you!

[Tiburon]

[Danhdan]