from early 2009 to 1.11.2010 i occasionaly used amphetamine and methamphetamine
But even after just a single line of medium-quality speed, off of which i was high for maybe 3 hours, a hellish comedown without the possibility of sleep or food followed, lasting about 48 hours, so i decided to quit them for good...
i never really got too much of a good feeling from them, it just enabled me to be social on, well, social events. they were good for that, but not worth the trade.
in addition to all these negative effects, i lost about 10 pounds per session (4-5 medium sized lines of speed OR 2 tinytiny lines of crystal), and i needed about two weeks of eating very much, to regain these lost pounds...
i'm 1.85 meters tall and weigh 60 kilos on average, so i'm quite fragile to begin with, i guess that was the deciding factor.
nowadays i very frequently blaze, occasionaly take 600mgs of tramadol over an evening, take psychedelics (especially dissociatives, which turn me on like nothing else

)
so you could say, i've grown out of stims, before i could really grow into them