Okay, mister compulsive jerker, take that with the grain of salt and body massage oil:
alpha-PPP (IV 150 mg) gives dissolving warm rush of an euphoric stupor and a whole body orgasm - I do not recommend following this route. You will binge and when binged this stuff gives strong bad sensations in the back(there is a vasoconstriciton and kidneys are suffering). Plus you must add pronounced tachycardia, shortness of breath, inability to seat still and speak well. Oh, and an Anxiety! Anxiety is very similar to MDPV, it has the same chacteristics to it and is not so prolonged.
Methcathinone (IV 200mg) gives similar kind of rush, but it is more benign, you don't feel so jumpy and the action is smooth.
3-FMC is similar to methcathinone and the maximum I have shot is (IV 150 mg) - rush was very bright and orgasmic, but calm and not jumpy at all. This is the safest of three. Again if you binge than the gram lasts 5-6 hours maximum, after that you are craving, but interestingly you can calm yourself and not get psyched, just lay and chill, It helps.
So, that is the basic info on the cathinones.
I have also tried MDPV which is utter shit and alpha-PBP, which when smoked(10-20 mg off the foil) remind 3-fmc in its best, but wears off very quickly and make you dissapointed.
Basicly all the pyrrolydinyl-type cathinones are more adrenergic and kind of "flat". With methcathinone you feel some kind of goodness of the rush, pyrrolydinyls are super stupefying.
That is quick resume of my past(thanks god, buddha and my friends

) addiction to cathinones.
A-ha-ha, don't forget to have broadband or porn magazines on the hand.