Something that I really wish I didn't do was twitch my eyes and nose. Over the years, I've just been unsuccessful in training myself to stop it! I try to do it less when people are around, or mask it, but I just feel compelled to do it. It sounds a bit OCD, but I don't believe I have enough OCD qualities to truly fall into that category. Sometimes I'll blink my eyes individually or roll my eyes a bit. I twitch my nose a ton. The funny thing is, I specifically remember when the nose twitch started... it was toward the end of my senior year in high school. I don't remember having a problem with it beforehand, and I don't believe I've ever really stopped it since. It's completely voluntary (though often subconscious), but I just hate it. It's an unnecessary compulsion that I could really do without.