As far as the debate that raged on earlier about personality versus looks and which is more desirable, my opinion is a bit complex. My opinion is that if I'm just looking at women online and they seem attractive physically, but I don't know their personality, I've got no problem admiring their beauty. That being said, if I'm looking at a woman and I know she is a straight-up B*tch, that takes away from how attractive I see them a lot, because I just don't like stuck up women who think they are god's gift to the world because of how attractiv they are physically. Now, if I'm looking to date a woman, yes physical attractiveness is very important, because I can't see myself being happy waking up to an ugly woman just because she's nice. At the same time, personality is KEY, because nobody wants to wake up to somebody who's grumpy 24/7 and who treats them like crap and as more of a servant and less a lover.
For me, I guess you could say that I'm just not a fan of stuck up women for the most part, that ugly women no matter how sweet they are just isn't my speed and that when dating, I'm more a guy who looks for a balance, as I feel a balance between physical attractiveness and personality will make for a happy relationship, as opposed to just looking for one thing or another in a potential mate, an approach which I feel is somewhat naive.
As for the question at hand: I voted boobs (Though the woman needs to be attractive than in more than just that department for me to really get turned on by her). I'm more of a fan of the small/below average/average sized breasts, with more of leaning towards small boobs (anywhere from a small/mid/large A cup or Small/mid/slightly above average B cup), though I can make an exception for larger breasts if the tittays are proportionate to the rest of the woman's body regardless of their size. Oh and one thing that really he sells me on a pair of boobs regardless of size (though they are far from necessary in a mate.) are nipples of the more....prominent variety.