Physical appearances you refuse to date.

[SOPi_Jawbreaker]

I think all of mine have probably already been mentioned:

bad teeth
bad skin
facial piercings (I used to be into guys with lots of piercings and tattoos. But now that I'm older, I'm more into the young professionals look, i.e. a guy that looks good in a suit and tie.)
visible tattoos
unibrow
fake tan
spends more time primping than me
slovenly-dressed
smoker
obese
shorter than me (I'm only 5'2")