Yes, "one kind", by definition of being a disorder: https://en.wikipedia.org/wiki/Mental_disorder https://en.wikipedia.org/wiki/Mental_disorder "Some people",

Yes, "one kind", by definition of being a disorder: https://en.wikipedia.org/wiki/Mental_disorder https://en.wikipedia.org/wiki/Mental_disorder "Some people", "commonly" already implies a variety in symptoms and manifestations. But by definition, they all cause clinically significant impairment, or distress.