Cannabis is fine and technically not a drug (technically), a bit of schizophrenia later on if you over use, mild paranoia while under it's effects, but It's better for you than alcohol, and can be really enjoyable (subjectivity is awesome).
Other "hard" drugs, I'll stay far far away from that shit. (I'm a human, so I have a choice, gateway drugs don't exist only poor choices.)
While they do have a bigger, more euphoric high. You also have to contend with all the other shit that comes with it, addiction, "meth face", being a fucking smack head. The list go on.
In terms of legality, the hypocrites are always going to look down on me for being a stoner, but remember alcohol is fine because "its okay to drink your drug" and "ETS PAART OB R TRADISHUN".
I'll stop now, before I go into full on green warrior mode.