I can relate to the addiction side. Before I knew I was taking a PH, I was taking a PH. I didn't know what PCT was at first, and after a while things caught up with me. I'd say I lost 85-90% of gains made from any PH cycle/abuse. The last 2 year's though, I corrected 90% of all my issues, and spent a large time Natty. I have run light cycles IE: The stanodrol/dermacrine I am on now. However, I don't plan on going back any time soon, and maybe only one cycle a year.
I can say, if it wasn't for the immediate results of PH's, I may have never stuck with this sport.
I contribute 80-90% of my gains to natural hard work, research and dedication. I even feel I lost a year with little gains do to the PH use or discontinuation of. I never felt better than my Natty bulk this year, and it was absolutely awesome.