hmm.
I check all the locks on doors and windows, and then check the security system 5 times before I can even attempt to sleep, and even then it's hard for me. That's more of my paranoia than any kind of OCD tendencies.
Other than those, I'm not really set to any routines or anything.
I keep lists of my cds, and I update it frequently throughout the day (but that's only because I want to keep it up-to-date and I download several albums everyday). I hate clutter on my computer. All my MP3s are in one section in their artist's folder. Itunes does that, ahaha, but I can't stand when anything is outside their specific folder.
If we're talking quirks, I hate when people sing over music. I correct people when they're singing in the car and they sing the wrong lyric. I can memorize lyrics within the first 5 listens of most songs. I hate the taste of water so much that I won't drink it unless it has propel flavoring in it. When sleeping alone (which isn't often), I get so frightened that I have to have the light on slightly and I have to have stuffed animals on my bed. I don't get to sleep until very late because it means less time when I'm unconscious during the night. I hate when people don't automatically answer text messages. I think it's rude, and I don't care what you're doing at the moment. I almost always have 20 seconds to answer a text message.