Which personality traits would you change for a partner? If any?

This question has kind of been inspired by a prior question. Now of course “I will stop smoking” is a behaviour, not a personality trait. Maybe for example you compliment people both males and females often. Like “Ooh that colour really brings out your eyes!”. Perhaps this comment would upset your partner? Maybe it would not. (Perhaps he feels you are coming onto the person?). Would you modify your behaviour to appease your SO? and in which ways and why? Do you think you would then “lose” a part of who you are, or do you feel this loss is worth the gain you have in having a SO?