I like snorkeling and did it on my first boob cruise. However it occurred to me that as infrequent as it is that I get to snorkel it is even more infrequent that I get to party with a boatload of drunken topless women. After that, I got my priorities straight and skipped the snorkeling. Truthfully, the snorkeling stop was "okay" at best - not worth it given the option.
Then we are alike. I have no problem staying sober - at least during the day. Too busy playing volleyball or socializing - whatever. Cheryl however manages to find the party crowd and jumps right in. I'm sure you'll agree that this arrangement works, someone has to be sober enough to look after your drunk asses and make sure that you eat something during the day. Jim:bootyshake:
Diving Cozumel & diving Cancun are not even close, Cozumel beats it hands down. Several quality dive ops in Coz, and I have dove with a few. Allison, Chucho, Scuba Shack are all good. The formations & the sea life in Cozumel are by far better. You can check out scubaboard.com and they have a Mexico diving sub forum
Diving in and around Cancun is really not that good. Taking a day trip to Cozumel would be a better option if committing most of the day anyway. A few years back we thought we'd try a 2 tank dive from Desire. It was so bad (poor vis, nothing to see) that we went back after the first tank.