Ive been drunk countless times and when it was cold on the streets ive had a smoke to warm me up but as for the "hard" stuff I dont think I have. (Not willingly anyway)
I dont take drugs...never did, never will..
I dont take alcohol too, drank b4 tho, not because I dont want to, my body is sensitive to alcohol...gets all ichy for weeks.
I find weed an alright experience. I don't go buy some myself, mainly when a friend has a joint and we all just share some. It's not harmful and I find it a rather fun and interesting experience. I did a little ecstasy when I went to my raves a year or two ago. After my second experience I realized "Wait, what the hell am I doing? I don't need this shit, I already love the music and don't need to experience it." Haven't done it since. I don't see myself going into drugs beyond weed really. Alcohol maybe, but I don't like the taste.