I smoke, generally not alot except when I'm drinking (Mark can verify this). I enjoy it, I like it. I've heard so many bad things of what people go through when they smoke for the first time; sickness, spinning head, bad taste etc. I never got any of that, from day 1 all it did was just get me off the ceiling mentally, which was excellent for College after a 2 hour lesson with some snobby crab called a human being.
For other stuff, used to and do now occasionally if I can't get any sleep. Pretty much quit when I realised that all I was doing during my spare time was getting with a bunch of friends, getting sky high and giggling at anything we saw on TV. Very fun, yes. But not exactly productive as you can imagine.