I don't think any psychiatric diagnoses are actually mental "illnesses"…"mental illness" is IMO a phrase which was originally used metaphorically but has increasingly (if not universally) come to be (mis)understood *literally*.

But as I like to say sometimes it's only a problem if it's a problem. Why is calling something a mental illness a problem? IMO mostly because of stigma—get rid of that and debate over terminology fades away. Having said *that* the only way our society currently seems to have come up with for advancing this goal is defining MI as a biologically-based brain disorder—something with which I disagree strongly.