Since we don't yet have a specific community for custom phone ROMs, let's discuss them here. Are you running a custom ROM? Which one? On what hardware? How is it?
I recently flashed LineageOS on my old Note 4 that had previously ran a few custom ROMs but other than that haven't used one in years since I haven't had a need with my last LG or current Samsung phone.
These days there's more of a need for custom hardware like a headphone jack or SD card slot but unfortunately those can't just be flashed to a phone like a ROM can. The software/firmware side of things has been fine for me.