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.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.