I wouldn't call it full-blown OCD, but I also sometimes have the tendency of wondering if I have really closed all the windows, turned off the lights, locked the doors etc. etc. when I'm away from home. Maybe I'll start doing this too...
Yeah, I need to point at the stove and say "stove off" when I turn it off. A few times I have started driving away from my house and suddenly been hit by a sense of dread that I might have left the stove on after cooking breakfast.