Quirks:

Men with half-unbuttoned shirts in public
People that suck their teeth (Sam Champion on Channel 7 does it and it drives me bananas!)
Inarticulate newcasters in general
Tailgaters!

Fetishes (obsessions? )
Counting things
My cats!!
My lab bench, but not my kitchen, must be in military order. Go figure.
NO ONE HAD BETTER TOUCH MY DESK!!

Superstitions
Don't ever say a test method is successful until it's written up.
Knocking wood