There are categories called other than or not otherwise specified type which basically means we are calling it X but also labeling that you don't me the normal criteria for the diagnosis. I have some diagnosis like that. I tend to smile and get chatty when meeting people and I am also well spoken, polite and with good manners so I don't present as someone with chronic Major Depression amongst some other stuff. Its basically a combination of long time masking of my mood and how my anxiety presents itself. I smile a lot and get very talkative and "social" but its anxiety. I also isolate a lot so I get fairly lonely and when I am in a situation I have to interact with people all the above happens.