I've been making this list over the past four months or so. Far more of these apply to me than I care to mention.
Oh, and one more thing. I understand that a few are opinion based and that my opinion may differ from others'.
You play “Rock-Paper-Scissors-Lizard-Spock” to resolve disputes.
You do three knock cadences when summoning someone.
You know all the words to “Soft Kitty.”
You shout “We built the pyramids!” during the theme song.
You know that Tweedy Bird really “taht he taw a Romulen.”
Your comeback to bullying is “a homo habilis discovering its opposable thumbs says what?”
You label everything in the house, including the label maker.
You know the full names of Leonard and Raj.
You know that when you understand the laws of physics that anything is possible. (Mua ha ha)
I seriously want to nominate him for best character on tv. :) At first he drove me crazy, but now i anxiously wait to see what kind of "over-our-heads" braniac thing he will say. He kinda reminds me of a robot from some sci-fi space odyssey that's been sent down to earth to live amongst the dumb humans. He really stands on the fine line of being a genius or being completely insane. Sometimes i can't tell. :) On the last episode when Penny put the alcohol in his diet coke, i thought i was gonna die cuz i was laughing soooo hard. Seeing him playing that piano and singing was priceless. Anyone else like Sheldon as much as me??? I look forward to next week's episode just to hear sheldon speak. Haha.