I thought of a few more. . .
Other people had mentioned it previously, but I too crack my neck. For me, it's always the right side before the left, and then immediately vice-versa.
If I see a crooked picture on the wall (doesn't matter if it's at my place, a friends, or somebody I just met) I tend to focus on that solely until it's re-aligned.
When I'm in the middle of eating, I twirl my fork through my hands. (do the same thing w/ pens, pencils, and highlighters while I'm thinking)
I easily recall the most insignificant information, yet I struggle to remember people's names unless I make a special effort.
I'll stare at half a dozen menus for carry out places and ultimately decide to make something myself.
I probably use google more as a spell check / back-up dictionary. (as opposed to finding people, places, pictures, etc . . .)
I'll eat the same thing for a month or two straight, and then never touch it for around the same amount of time. (ex(s): oatmeal, graham crackers, raisins, cold cereals, snack bars
I pay for an enhanced tv package, yet I rarely watch over 5 or 6 hrs of tv per week.
I never consistently watch a show past the 2nd season. I usually tire of them very quickly; occasionally, I'll catch an encore of a later season, but I'm usually lost since I haven't been watching, so it's unappealing.
I'll buy a video game that I'll never or rarely play; it eventually is given away or traded for another. (except for in the case of rpgs. What I said usually applies to fps and sports games.)
I make owl noises that are surprisingly accurate.