As for type of drug preferred, yes, I agree that it's difficult to predict based on type. As for doing any sort of drug, I think that certain types are more prone to drug use. In my experience, these would be:
ISFJ and ISFP may experiment, but end up stopping.
On INTPcentral, some INTPs are vehemently against drug use, and some enjoy experimentation.
I think INFJs are the same way -- open to experimentation, as long as it doesn't go against their ideals.
I think ENTPs pick a drug and stick with it.