Bizarre habits

I count repetitive things I do - like slicing, stirring etc.

If I walk on big crack on the pavement with my right foot, I have to walk on the same crack, but inverted, on my left foot, so they feel the same.
Drives me mental.

Levels on TV sets (the volume, etc) must always be an even number, or in multiples of 5.

Volume at '17'? No chance!

I'm always convinced the "balance" knob on my amplifier is never perfectly sat in the mid-point click.

i check things,

mostly: phone, wallet and keys.

like i'll put my keys in my bag and 10 seconds later i'll check they are still there.

I do all these... :O