In my personal experience, ritalin was the worst stimulant I tried - the crash was bad, it didn't last long at all, left me anxious at times, and just didn't feel right. Same for concerta and the whole methylphenidate family.
But for some, they prefer ritalin and co - so it's really a trial/error thing IMO. Some people react better to amphetamine, others to methylphenidate. It also depends what other meds you're combining it with.
I liked Adderall XR (no access to Adderall IR here in canada) but found it slightly over stimulating - some love the extra kick that the levo-amphetamine in the Adderall gives, others don't.
So for me, Dexedrine IR works best. Its not overly stimulating, it lasts a good 3 hours, it's cheap, and the crash isn't bad.
Keep in mind I am on a cocktail of meds though, so I never have a 100% read on anything - just my daily logs and comparisons.
And as crayzy said, adding memantine to your regimen will stop the tolerance (not reverse it though) for any stimulant and keep it effective (pro social, mood lifting, less crash, etc) provided you take 1 day off per week.