Very true about everyone being different. When I saw first diagnosed with ADHD-I, my pschyiatrist began with Ritalin. While it definitely helped me focus more, the come downs were absolutely awful and I'd feel incredibly depressed when it wore off.

Adderall worked much better for me in this regard and the come down was much less harsh. I take 20 mg IR a day - I try to keep it down to 3-4 days a week to stave of tolerance as I'm very worried about it.