[cbloom]

You shouldn't just be aggressive for its own sake. You want to raise with draws for specific reasons - to get (incorrect) folds, to disguise your hand for better implied odds (this rarely works), to buy a free card on the turn (again this is rarely correct), or some combination.

For example, raising a good draw in last position on the flop is nice because A) it builds the pot if you hit, B) he may just fold, which is nice, C) if he pushes, you can often correctly call, D) he may check the turn E) it puts you in the lead, so if he checks the turn & river you may be able to bet unimproved and win the pot with a pure bluff.

A very rough guideline for semi-bluffing with your whole stack is that you should never do it unless it's pretty likely they will fold a better hand. If not, just call if you are getting correct odds.