You actually like Strattera? I went on that stuff for a month and it was the worst feeling ever. It felt like a gun pressed up against the back of my brain all the time, I pretty much wanted to die.
Ritalin and traditional stimulates on the other hand are always great but I build up a tolerance quickly. (Currently I just use various caffeine sources to concentrate.)
If you were only on the Strattera for a month and felt like you "wanted to die," you were probably started at too high a dose. They come in doses as low as 5mg.
For the same reason there are dozens of NSAIDS and pain killers. Humans are complex systems, and complex systems exhibit complex behaviors including differing reactions to similar inputs.
Ritalin and traditional stimulates on the other hand are always great but I build up a tolerance quickly. (Currently I just use various caffeine sources to concentrate.)