Ah, the introvert. Thoughtful, pensive, reserved. Perhaps even brooding.
They might not go to (their own) party with you, they may linger behind the potted plants if they do, and they will almost certainly avoid all eye contact and small talk, but hey, even introverts love a good gift!
Show them you love them despite or because of their shy, awkward ways, with one of these awesome introvert gifts tailored made for your very own antisocial butterfly.