One of the true joys I have in being currently unemployed is that I've had time to not only pursue my own diverse reading, but to join a book club started by a friend of mine. The ladies in the book club are an exceptionally interesting group and we always have fun meetings. We even manage to discuss the book at least a quarter of the time!
Last month we read Addition by Toni Jordan, a new Australian author. We all enjoyed the book very much but the best part of the experience was, of course, the discussion. The book's protagonist, Grace, suffers from OCD brought on by childhood trauma. That led us into a discussion of what OCD-like tendencies we all have. Our list included everything from hand-washing to eating food in even pairs to playing number games in our heads. I play number games with digital clock readouts (which is pretty common) and, when I was a child, could calm myself by counting in multiples of 2. 2, 4, 8, 16, 32, 64... I used to be able to get to 2^15 or beyond before I actually had to start adding.
So what about you? Any slightly odd habits (that you're willing to share) lurking in your past or present?