Big drawing hand--take the free card, or build the pot?

[Poker Clif]

(Edited for spelling)

Everyone knows that you consider the pot odds, and usually wind up calling after flopping, say, flush draw with gutshot and overcard.

But if you're the favorite, then shouldn't you be building the pot as well? If so, at what point, and by what criterion: Pot equity? Pot odds? Implied odds? Some combination of those?