How do you feel about medicating people with Bi-Polar disorder, schizophrenia, ADHD, etc.,?

Do you think they really need it? Do you believe in mental illnesses?

I personally have been diagnosed with all three of the above mentioned with an addition to Major Depression Disorder. I've been put on Zoloft, Prozac, Lexapro, Cymbalta, Wellbutrin and Trazadone. I was on Zoloft from when I was in sixth grade all the way into my junior year. Then from my junior year until the end of my senior year I was on all the other medications. Now that I'm graduated, I don't take anything. I don't really feel the need to, and it seems like I'm doing okay without them. I just think I had a bad week in middle school with my anger, and was wrongly diagnosed with ADHD.

Since I don't really know anyone else with any "mental illnesses", I was wondering if anyone else was in the same boat as I was/am? I would love to hear anyone's input