From my experience in drinking and smoking ciggeretes I have a few things to say.
The most powerful attraction of alcohol is its ability to allow you to inhibit your inhibitions. This means you'll feel more comfortable and capable of doing something you subconsciously want to but can't because you're restricted by social norms. There is nothing wrong with this, but the line is drawn to what extent you take this notion into. (Flirting is miles from cheating/raping as a rough example.)
Smoking really is a crappy drug though. I feel a head rush that makes me dizzy and visually impaired which is kind of trippy but other than that it's not worth it. The Cancer, Smell, Uglyness, Dirtyness of smoking is not worth its half-assed high.
Now weed I haven't tried it yet but I've seen its effects and it really is a grey area for me.
