Alone, I was just thinking about this topic (dreaming about the drug of choice)...I don't think I have had one of those - or at least not that I know of. I do remember having dreams about smoking a cigarette at least once, but not alcohol.
When I was in my first year or two of drinking and smoking, the smoking was the heavier habit. A friend about twice my age who loved coffee, cigarettes and wine asked me which things I could give up and in which order. For her, it was wine, cigarettes and then coffee as the last thing. For me, it was coffee, alcohol and finally cigarettes. Somehow I was right at that tender age, ha ha, because that is pretty much how it has played out, although I have not let go of caffeine itself.
Anyway, I don't know if that fits into your topic very well, but it's what came to mind for me.