I took Concerta for several months, starting at 36mg and moved up to the next highest dosage. The side effects I had while taking Concerta was very intense anxiety and sometimes panic attacks. I completely stopped taking it because I felt like I was going crazy and it was not working for me. The withdrawal effect was mainly a depressed feeling.
For the past year, I have taken Adderall IR and just recently switched to Adderall XR. I prefer Adderall XR over the rest, as it doesn't seem to affect my mood and allows me to get things done and feel like myself. I do feel some nervousness, but drinking lots of water instead of caffeine seems to help.
This was just my experience, but I know different meds work better for some than they do for others.