Alcohol is fine every now and then, Absolut Citron, Guinness, or a mudslide for me please. Other controlled substances.. well, walls have ears these days, but let's just say that while I'm very open minded, I'm also very scared of anything that involves needles or razor blades. Moderation, being well informed about what you are doing, and retaining control over your life, would probably be my main guidelines in this area. 

And yes, I smoke... what can I say, a nasty little European habit I picked up. However, several times in the past, most recently last summer, I took 3 month long non-smoking breaks. I like to do that every now and then, give my lungs a chance to recover, enjoy the beautiful LA air, and a reality check on just how much of an "addict" I am. Smoking is something I enjoy but if you let me know you don't you might never even realize I'm a smoker.