I'm a geek and so I love intellectual girls who can chat with me
about topics that isn't so commonly chatted! (Philosophical
Statistics, Psychological Economics, Astronomy, Theoretical
Physics, Shakespeare etc)
But I'm quite a shallow all rounder in all fields so my
conversation will bore a specialist very fast.
I think it all boil down to finding someone of
similar intellect rather than "smarter = better" outright.