After 15 years of something similar (if not exactly the same thing -- we should talk) I'd suggest that you're in a valley of happiness now, please enjoy it as I can guarantee that it won't last. You're going to cycle back to the other states.
Unfortunately it's not a sine wave, it's more like a downhill slope. As you age, it only gets worse. I hate to appear like a dark cloud over the OP's sunny article, but I'm 27 years in. For the first 10 years or so, I too believed it made me stronger, tougher etc. Now I'm just happy to make it stop - whatever it takes.
Having said that - I'm glad it's working for you as well.
My hope for the OP and my intention in writing was to encourage him to have some psychic cushion for the potential of a return to strongly symptomatic existence. The only constant is change.