Neither tbh, they're both nice features, but if I had to choose I'd have to say the breasts. After all, one of the main purposes of breasts besides feeding offspring is to attract a mate. Either way they're both nice but like a few other people in this thread, I'm much more of an eye person. If you could only look at one thing while having sex, nothing will make it as special as the eyes do, looking back at you, as you both peer into one another's soul, seeing that person truly naked. Better yet, you don't even have to be having sex to look at them, and better still, you can look at them in public without being arrested or called a sinner etc etc. true beauty.