I’ve tossed various periods around in considering this question.
I studied the history of the Tudors in high school and subsequently read a lot of fiction set in Tudor times … to the point I grew tired of it.
I’ve read a lot of Regency romance and enjoy the period … but I’ve possibly read too many, because I’m a little tired of that as well.
I’ve also binged on and grown tired of US Civil War fiction, Western expansion fiction, Gilded Age fiction, and World War I fiction (although I’ll still read anything by Elizabeth Camden or Roseanna M White because their books always manage to put a unique spin on a period).
I am currently enjoying more modern historicals, novels set in World War II from authors such as Jennifer Mistmorgan and Janyre Tromp.