Guys, what would put you off about a woman's appearance?

I am doing a survey to find out. Personality wise, she is great, and she is in the age-range you would consider dating. But there is something about her appearance, that puts you off. What would it be?
Update: Nemo, I had a look at your question about what to say to him, but could not vote for a best answer. Alarm bells rung at paranoid. Looking at your other questions, you have been dating him since. I have replied to some of your later questions.
Update 2: Nemo, I had a look at your question about what to say to him, but could not vote for a best answer. Alarm bells rung at paranoid. Looking at your other questions, you have been dating him since. I have replied to some of your later questions.
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