So what gaming OCD's do you have?
Me? If I'm real close to a new level, hit points, etc... "threshold" in an RPG then I have to level before going on. For example, if I have 398 hit points and I'm ready for a boss, I'll hang out and earn my next level so that I can face that boss with over 400 hit points. Same goes if I'm level 39 and ready to face a boss. I need that level 40!