From Longman Dictionary of Contemporary Englisheach to his/their owneach to his/their ownused to say that we all have different ideas about how to do things, what we like etc, especially when you do not agree with someone else’s choice I’d have chosen something more modern myself, but each to his own. → each
Examples from the Corpus
each to his/their own• It is a case of each to his own cell with no slopping out.• Fathers should customize each to their own particular needs and situation. 