Personality traits or mental disease?

I have always been a firm believer that mental illnesses exist only to categorize certain behaviours that other people don't understand or can't relate to.

It's like society needs you to fit in a box.. If you are an artist then you are crazy. Generalizations and so on.

I have to say, I've led a very interesting life, now I'm just working a regular job being a mom and wife etc. I don't use any medications and my psychologist is my mom. There was a time where I wasen't this stable. Somehow I got here. Maybe because I never believed any of my labels.

Why do you?