It is considered a 'psychedelic amphetamine', I don't really consider it as just a stimulant having tried crack cocaine, methylphenidate and amphetamines and not really enjoying them...MDMA however I absolutely love. The difference is that ecstasy unlike your average stimulant does more than keep you awake and give you euphoria, it has purpose beyond keeping you up at raves and recreation and can be a very spiritual experience like another well known psychedelic phenethylamine, mescaline.