A Weekend-engagement post - Strange Habits

I've decided to do something a little different from my usual postings every day.
Going to try and take part in these weekend-engagement posts by @galenkp.

Picture Source

Now I'm not good with writing so please bear with me.
I think most of us have some weird habits/quirks and so I decided to use,

ONE: You're strange! Name and explain some of your personality quirks, strange habits or oddities

I will surely avoiding the common habit of playing with my hair while thinking.
But the one that actually annoys everyone at home is my addiction to "Darkness".

I just have to sleep with the room door shut and room has to be as dark as possible.
I just cannot sleep if there is even a little light coming in.
In fact when I was staying with my fiance, I made sure he also had thick dark curtains
so no light could come through.
He felt it was a weird habit of mine.
But I just feel I am safe in my sleep if the door is shut and room is dark.
Like no bad things can happen because no one can see you nor reach you.
Isn't it true?
I can literally sleep anywhere as long as it's dark.
No matter what time of the day it it.
A little light anywhere and I just can never sleep.

I don't know if this qualifies as a weird habit or quirk,
but it surely annoys everyone at home.

Apart from this I just have this weird habit of adding the numbers on a car number plate.
And I like it only if it adds up to odd number.
Like if the number is MH05MH0203,
I will add 0+2+0+3 which is 5 and since it's odd,
I won't be tensed while travelling in that car.
No idea why I have this habit,
but guess someone told me if it adds to be an odd number,
it's safe!
My fiance always felt the easiest way to kidnap me,
is to make sure the number plate adds up to an odd number!