What is the nerdiest thing you do without shame?
For me, I openly discuss random scientific trivia (mostly acquired via VSauce) in public with my friends. People think I am such a nerd but it makes me feel smart.
Also I play guitar hero on DS in public as well as pokemon. Low volume. No shame!
My cousin and I regularly talk about skyrim lore and gameplay.. Every time he comes over, it's like a skyrim bomb went off. We love our video games.