I have been spoiled at work. My office is huge with floor to ceiling windows on one wall and the wall across from that is glass overlooking the hallway. (the other two walls are just walls, but I do have a door, which is great.)
There is an office directly across the hall from mine, but it has always been used (sparingly) as a conference room. So I never had to worry much about anyone sitting across from me, looking through their glass wall, observing me picking or hoisting or scratching or anything. But now, I have a neighbor across the way. So I am becoming more aware of the little things that I do when I think no one is watching.
Aside from the picking, scratching, etc, I have noticed that I talk to myself all day long! I talk to emails, to news stories, to paperwork, to my mail. No wonder my plants do so well. I always knew I had a lot of inner dialogue, but until I started catching myself mid-sentence making eye contact with a slightly confused co-worker, I didn't realize how much of that inner is actually outer.
I've heard that you're only crazy if you answer yourself… I'm pretty sure I've even started arguments with myself. Maybe if I just start picking up the phone when I talk to myself, she will think I am talking to someone on the other end.