to each his own

to each his/her/their own

Everyone has a right to have different preferences or make different choices. I personally wouldn't have chosen such a flashy car, but to each his own. A: "It's a bit of a guilty pleasure, but I really love watching cheesy horror movies." B: "Hey, to each their own. I'm not going to judge you for that."
See also: each, own
Farlex Dictionary of Idioms.

To each his own.

Prov. Each person has the right to make choices. A: Bob likes chopped prunes on ice cream! B: To each his own.
See also: each, own
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

to each his own

One has a right to one's personal preferences, as in I'd never pick that color, but to each his own. Versions of this maxim appeared in the late 1500s but the modern wording was first recorded in 1713.
See also: each, own
The American Heritage® Dictionary of Idioms by Christine Ammer.

to each his own

Every person has his or her own preferences. This phrase, appearing in slightly different versions since the 1500s, is most often a remark that someone has a right to different preferences from one’s own. See also no accounting for tastes.
See also: each, own
The Dictionary of Clichés by Christine Ammer
See also:
  • to each his/her/their own
  • chacun à son goût
  • left, right and centre
  • left, right, and center
  • left, right, and centre
  • (as) different as chalk and cheese
  • as different as chalk and cheese
  • chalk
  • knock the habit
  • knock the/(one's) habit