[margor]

Do you really believe there is only one kind of OCD, specifically one you described?

I'm sorry to tell you, but both ADHD and OCD exist on a spectrum. Furthermore, ADHD like symptoms can be caused through other illness than actual dopamine deficiency.

[allworms]

There are many kinds of OCD! There are zero kinds of OCD that aren't a disorder. A helpful mnemonic is: you could imagine OCD stands for "obsessive compulsive disorder".

[jijijijij]

Yes, "one kind", by definition of being a 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.