You asked for comments, I've got em ;0)
The whole idea of "drugs" is a sort of philosophy we're sold. By that I mean, there isn't a clear line between what is and what is not a drug. Things like sugar are pure substances that alter behavior, and gambling ruins at least as many lives as speed, and its 'only' an idea.
So the question becomes, where are you going to draw the line on drugs? You'll only take legal things? Well alcohol destroys more lives than anything, and it fucks with a bunch more on top of that. Maybe only caffeine?
For me it boils down to an attitude of care towards my life and my future, and an awareness of my responsibilities to the people in my life, and a willingness to think about how my life fits into the greater picture of life on earth. My relationship to "Drugs" means nothing outside of that framework- how I live my life in general.
Because I felt like you did, and I totally gave up all drugs, right down to sugar (never drank coffee in the first place). I did it for 2 years, and I fucked up my life those two years. Basically I was an uptight asshole, my grades plummeted, I wasn't dealing with stress, I was worried and judgmental overall, it was horrible.
The thing is, substances that moderate our behavior and brains are naturally in the context of our life. Its some tricky government bullshit to think that they are inherently bad or something. Of course, people can definitely use drugs as an excuse to avoid responsibilities or sabotage themselves, but they make that decision. If you're trying to live well, a chemical isn't gonna sneak up behind you and pull your pants down-- and abstaining from all drugs won't magically make you a well balanced individual.
<note: Those two years off did break my relationship with alcohol and pot. Now I only like to drink or possibly smoke a couple times a month, and before it was an everyday thing. I think that is a positive development. So take your own road, and see where you end up. >