Pretty damn nerdy. [He snorts - in all honesty, not that much nerdier. But when you compare him to Tyler, Stefan might as well be that kid shoved in a locker.] We're talking "takes things to the lab to analyze them" nerdy. If something can be done for science, he does it.

Also weirdly obsessed with tea. [His Damon is too, now that Tyler thinks about it.] But I don't think that counts.