Dr. Spencer Reid from Criminal Minds. Supergenius, full of knowledge. Want to eat his brains and gain his power. Also, he's a sweet supergenius, and while occasionally baffled by human interaction or unaware of social norms, he's not malicious, just random in his blurting-out of facts.
Part of this is fictional-crush-motivated; I have a very real thing for brilliant people.
Sure, he's of a body type to which I personally am not typically crazy-attracted (I am not a small person, and do not relish the thought of accidentally snapping skinnier folk like twigs), but seriously. SO ADORABLY NERDY.