What are common personality traits in the opposite sex that if you could completely change, it would give them the biggest boost in attractiveness?

If personality doesn't matter to you, please don't answer this question.

I'm sure most of you can think of 1-3 things, but you can say more if you really want to.

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If you could explain how/why it's such a big deal, thank you, that would be very helpful. This is simply for my curiosity and hope to make the world better
What are common personality traits in the opposite sex that if you could completely change, it would give them the biggest boost in attractiveness?
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