Your night vision might get better (heard this from a guy who had to take a break from drinking lots for many years).
"Brewer's droop" or "whiskey dick" might go away. Have a box of kleenex and a tube of KY or a friendly girlfriend ready at hand. Decide in advance whether wanking or drinking sounds A) cheaper and B) more fun.
Not taking in all those extra calories might knock a few pound or two off your manly physique - decide whether you can tolerate that.
I've heard other things, too, but maybe not as reliable. It will be hard to say.
You might think a little more clearly. Hangovers make decisions hard. Maybe you don't feel hung over, but have a hangover effect you can't feel anyway. That might affect your decision making ability during the day.
Might affect your mood, possibly for the better. Might not, but it seems to make a difference for some people.
You might have less BO. Some people, not everyone, seem to excrete some alchohol metabolites into sweat - beer and hops more than others. Maybe not you, and maybe no one cares anyway.
You might have a few extra bucks in your pocket at the end of the week. A case (24 cans, right?) at how much $ per case times 50 weeks per year (rounding off) = ?
You're likely to sleep badly for 2-3 weeks, more or less, but might sleep better after that.
You're certain to hear from all kind of people who promise all kinds of crazy it-shay. Don't count on their promises, because those people make promises they have no power to keep.