1. Spelling/grammar/pronunciation, all that good stuff. Not really on social media or message boards, but most definitely in conversation and important documents. If you wrote "loose" when you meant "lose" on a resume, I would never hire you, no matter what.
2. I'm part of the tie knot crowd as well. And TIE LENGTH. No more than 1/2 an inch above or below the belt, guys.
3. To go along with that, dress shirt collars. Its 2015 guys, let's leave the narrow-angle (sometimes called "point") collars behind. A spread or semi-spread collar is the way to go. Watch ESPN, you'll see what I'm talking about. Also, if your collar curls up in the corners, I will ridicule you. In public.
4. Kentucky basketball/football. Spelling of players' names, positions, rules of the game, etc.
5. TV shows. If you watch things like "Party Down South" and "The Real World" (is that still on?), we can't be friends.