My drug use:
Alcohol - 13
Marijuana - 15
MDMA - 16
Methamphetamine IV - 17
Became heavily addicted to Meth, still am right now, went on to try literally every drug in a short period of time... heroin/opiates (every sort of pain pill), benzo's, coke, pcp, ketamine, all the research chemicals, lsd, mushrooms, GHB, nitrous ect... could go on for a while.
I believe alcohol should always be the first drug, around 15 is old enough. Same time people should be able to experiment with tobacco, but not smoke heavily. Marijuana should wait till at least 17 I believe, I jumped the gun way to early. From there, people can move onto where ever they want, but generally, I consider methamphetamine and heroin (opiates) the end of the line...