One thought that I really like by Rand is what's known as her "Theory of Sex", on how attraction works, from Atlas Shrugged.
Francisco D
It's far from being very original and unique thought, though. A similar one can be found, for example, as a conclusion in Plato's Symposium, in Diotima's view.
I like these ideas because they describe very well how I work in these areas, so much so that I can't even do it differently. And I consider myself a hardcore realist, LOL... well, in many things yes, not all. But of course it's good when positive values drive us this way, and not despair and chaos.