For the most part, I agree with 'rilla and this is how I play my flush draws. The main reason is that people will most likely put you on 2 overs or a pair. This conceals the fact that you are on a draw for the most part so when you do hit it it tends to keep most people who would normally fold at that point (if there had been just checking/calling up to that point and then suddenly you lead out with a bet when the flush card hits) in the pot because they won't suspect you of having been on a draw.