I, too, like to indulge more on vacation. But the last two times we have been to WDW was in August, and as someone on the first page mentioned, it is hard to drink heavy alcoholic drinks in that HEAT, so we never got to drink around the World (we sampled a few, but never all pavilions)!
At night we would get a really good buzz on at Adventurer's Club, and I certainly will enjoy doing the same, if not get downright drunk, at Jellyrolls on my trip in December. We are staying at Boardwalk--we can walk home!
For the record, I don't go in planning to get drunk or buzzed, but at Disney it is very safe and we don't have to drive anyplace, so it's easy to really let go. At home one of us always has to be a designated driver or else pay high taxi fees to get to and from where we are partying.
We are not sloppy drunks in any way, and I have only seen sloppy drunks maybe once or twice, and it was in DTD, never in the parks.