I don't use anything but alcohol. Ask someone that uses the drug you're interested in (they're everywhere). I honestly couldn't answer that.
The penalties if convicted are beyond reasonable. Especially since petty possession with no intent to distribute hurts nobody but yourself. I would equate it to getting thrown in jail for not wearing your seatbelt and when you get out, you can no longer get a decent job. Your options for being a successful member of society are essentially over. All for committing a "crime" that would not have hurt a single person but yourself. And in a free society (which we are clearly not with government nanny laws), people should be free to do any sort of stupid crap they wish as long as it only harms themselves.
I am all for ticketing pot users. Providing it to minors is another story.