The heart is just a pump. It has a lot of energy and determination. But, good Lord, give me a fine mind!
I would choose a beautiful smart heart that knows honesty, trust, and the avenue to true love. He wouldn't have to be gorgeous but attractive to my eyes. I find that a loving heart can make that attractive person beautiful.
In the movie The Ward of Oz, the lion chose courage, the tin man chose the heart, and the scare crow chose the brain...Dorothy chose to go back home to Kansas. .The beauty of the film was Oz was beyond reach..
Well, since "brains" encompass so many things, like wit, humor, intellect, emotions, etc. and "beauty" is typically physical, I say "brains". Besides, God must have made days half dark and half light for some reason, right? Until the invention of artificial light humanity had to spend half their lives with someone they couldn't see anyways.