My experience is this: I drank to get a serious buzz (drunk). Once I got to that point, I would then need to nurse it (drinking more shots per hour) to maintain the level of that buzz. As my body became more tolerant to the alcohol, it required more frequent nursing (more booze) per hour to maintain that level. This progressed until I was drinking copius amounts every night and realized it was becoming not only a health hazard, but an emotional hazard in that my life began to revolve around chasing the buzz.
So, I am pretty convinced that moderate drinking is not an option for me because it would not produce the deisired result that I wanted from drinking in the first place.