to each one's own

This means “every person has his/her own preferences” and we often use it when we don’t share the person’s preference or we would have made a different choice.

它的意思是：每个人都有他自己的喜好，我们经常在当我们与他人喜好不同或选择不同时说这句话。

A: I don't think your shirt and suit go together very well.

我认为你的衬衫和西服不太搭。

B: To each his own! I like the white color of the shirt and the black suit.

萝卜青菜各有所爱，每个人喜好各有不同。我很喜欢白色的衬衫和黑色的西服。