I look at pictures and while I was "having fun", my face also looked bloated and I looked like crap. I would have never noticed it then, but I sure do now.
Also - how many pictures do you have of you hung over, puking or doing something completely idiotic? Most of us don't because we don't want to remeber all the bad things that go along with drinking.
Rest assured that it's entirely possible to have just as much fun sober.