Griffey and supa brought up a good point about not being worried about draws, because they are not a large part of villain's range. I'd like to elaborate that we should especially not worry about draws in this specific hand because the stacks behind are not deep. Any draws that people play tend to have more value when there are huge implied odds. When you call a 3/4 pot bet OTF with a FD and big stacks behind, you're not doing it because the pot odds are super-good, really, you're doing it for implied odds. With stacks setup the way they are in the hand, villain doesn't really have the huge implied odds that he would have if stacks were deeper. I'm not, of course, suggesting that the odds aren't there for him to call a small bet with a FD; I'm just stating that his EV, although positive, is LESS positive than if we had 6 or 7 times the pot behind. So when you are deciding if the value you get from his garbage by betting small outweighs the pot + implied odds you are giving him, the situation changes drastically depending on stack size. Or, to look at it another way, let's look at the odds we're giving villain, assuming we stack off 2/3 of the time he hits (remember he doesn't know we have a monster; we are gonna bluff cbet the flop sometimes and fold turn). The total pot + implied odds we're giving when we bet $2.25 into this $5.75 pot with $9 left after villain's call is ($2.25 + $5.75 + $9 * .67)/$2.25 = ~6.2-1. A profitable call for villain with his FDs and OESDs? Yes, surely. But what if stacks were deeper and we were gonna stack off to the tune of $15 remaining in our stack 2/3 of the time? ($2.25 + $5.75 + $15 * .67)/$2.25 = 8-1. Even though both calls are +EV, one is hugely more +EV than the other due to implied odds. This feeds back into your bet-sizing balancing act of "How much value can I get from his garbage vs how much EV does he gain with his draws?" and in the case of short stacks, the first part of that equation assumes more importance, since the second part doesn't hurt you as much.