I have never done any illeagal substances, just call me mister goody-good. I haven't done them for 3 reasons
1 They damage the way your brain works, releasing chemicals stored in your brain that were not meant to be released through synthetic means.
2 Cost, it's an extremely pricey habit, and doing drugs would force me to dip into my ''New Graphics Card' fund.
3. Friends, I would have to find a totally new group of friends because my old ones would never respect me again. (my friends diss stoners all the time, I don't know why)
That's not to say that I don't like people who do drugs, I've had 2 friends who did them, and they were good friends. Except they were so laidback it wasn't funny, you could tell them their mother died and they would go, "Yea...".
I hope that awnsers your question Sebu_Z