I don't smoke on a regular basis and rarely. I smoked more around 15(19 now) I would never do anything really hard. I have tried typical things like shrooms(three times),ecstacy(once) and have done a fair share of painkillers. Shrooms are pretty harmless and fun so you can try to those with someone. If you do enough of pure DXM(only robitussin) you might trip the first time. None of this is probably considered hard drugs.
www.erowid.org
I don't do stuff enough(except painkillers). I really like them though. My favorite drug i've tried. I have heard that 10% of teens abuse painkillers. i'm out