P-Sox when you say crystal do you mean high quality MDMA or methamphetamine?
d-methylamphetamine. To be honest if I could get a hold of plain euro style racemic, regular amphetamine I'd take that any day. The only reason I do crystal meth is because it's the only non-majorly serotonergic stimulant I can get besides the super expensive 15 minute duration cocaine. I like releasing agents much more anyway.
Meth doesn't get me going as much, it's too mental, geeks me out, anxiogenic without much in the way of physical body buzz and stimulation. Racemic amphetamine gave me the best balanced, fun, stimulant effects. It was amazing for outdoor activities, meth doesn't have as much of that non-chalant, happy-go-lucky vibe to it. Even d-amp wasn't as fun, it was missing that certain something. It was good for studying, but not as recreational. Racemic amp FTW; too bad north america doesn't have any.
I must also say my method of amphetamine use (besides when I went nutso with it) is fairly benign. I don't snort, smoke or shoot it. I have a 10mg/ml solution of which 0.1cc = 1mg, and I take it orally. I find anything over 20mg to be a bit too much, 10mg is a high to me. It's the same thing I used to do with racemic amp, but even oral methamp isn't as fun. The worst was when I snorted a bunch of it a while ago; just edgy, little euphoria or physically energetic fun factor. I find methamp makes me feel physically tense, and rac-amp gives me physical euphoria.
My brain got a bit fried out at a really early age.
Honestly out of all the bad things I've done in my life, the one that contributed most to my long term anxiety was smoking pot when I was a teenager. I started when I was 13 because I was being cool. It gave me anxiety attacks then but I did it anyway. Looking back, it obviously precipitated long term anxiety issues. Amphetamine use in my 20s doesn't hold a candle to how early pot consumption messed with me.