Personally I just experimenting w/ stuff about a year ago, and I gotta say I'm really digging the pyschedelics, but that's just me. I tried to turn a friend onto some and he just bugged out, he's a nervous puss tho, he couldn't relax.
I think marijuana has a bright future (hopefully). I'm only saying this because of all the documentaries I've seen recently. I haven't really seen any positive films on Cocaine, or any other illicit drug for that matter, but I just might be looking in the wrong places.