For me, the main benefit of not drinking is just the much, much easier ability to train and maintain fitness. Leaving aside the extra calories of booze (even in moderation), the dehudration, lack of sleep and general feeling of shit the next day means that I am far happy not drinking that I was when I drank.
Alcohol is a very damaging addiction that, for some reason, people find more socially acceptable than smoking. I hate smoking for the damage that it did to my fitness for years, but I detest alcohol for the damage that it has done to my relationship. My wife’s drinking was the main (and probably only) reason that I very nearly got divorced last year. I’d like to see it taxed to shit.