OCD

Over compulsive disorder
There is a thin line between being perfectionist and having OCD and the difference between the two is small, it's all down to how you handle it. Like washing your hands after you get home from shopping, taking the bus/tram/etc, a lot of people do it and it's considered normal but if you wash your hands in scalding water 3 times, it's considered not to be normal. Arranging the pictureframes in your window sill is also normal but not if you enter a slight state of panic if any of them should be moved just an inch, the annoyance of having to make it 'look pretty' again is normal, the panic is not.
No matter how you put it, the thin line is there and it's about how far you take it, your actions and rituals before it becomes unnatural and unhealthy. Watching 'As good as it gets' makes me laugh, turning on and off the lights 5 times before you can leave the apartment and locking and unlocking the door equal amount of times before you feel it's safe to leave seems like overkill to most of us but I remember what it was like living with OCD, I never had rituals like that, I find them silly and very abnormal but I understand the state of panic if things aren't 'right' - the through that clutches itself to your brain, fogging everything up and making you believe that if things are not 'right' then something will go wrong. "Which things?" A question my therapist often asked me but I was never able to answer it, it was just 'things' - everything, anything.
Rituals and a routine are two similar but very different things, rituals are bad and routine is healthy. Funny how that is and who sets the rules of what's normal and not, dominant and perfectionist people who are in control of their lives have routines to make their busy life run more smoothly and consider it a waste of time to stride to do everything in a certain way, they might do it themselves subconsciously but as soon as it's an action you're painfully aware of it's considered an obsession, a compulsive act and a ritual.
To me the difference between normal and abnormal is very small, it's all about to what degree you take your actions, consciously or subconsciously.