Winter - The cold weather, the snow, the ice, the people who forget how to drive in snow and ice, the short days... Everything about winter, really. And the static electricity. Ye gods, the static electricity. Long hair + static charge = bad times.
Casual Touchers - If you are a coworker, casual acquaintance, or (yes this happens) a complete stranger, why are you touching me? This is not a necessary component of normal conversation! Personal space violation! Shoo! Bonus demerits if you're a major corporate client who comes to visit us one day and your first instinct is to greet me with a hug. (Yes, this happened, too.) I...what...why?
Note that I have gotten comfortable enough with the Sharders I interact with on a regular basis that y'all count as "friends" and thus a hug-greeting at a convention or something would not be taken amiss.