I'm not saying that it's the only factor, just the most important one. Sure, there are definitely girls who are very attractive who aren't very smart, or just average, but I could never see myself in love with such a girl. Could I fall in love with a plain but fiercely intelligent girl? I'd like to think so, but I honestly couldn't say for sure.
We're on the same page then. Good, I misinterpreted your post.