Generally snorkeling off the beach isn't always the best, but there are always things to see. BVI has the advantage here as there are moorings at places you might like to snorkel. ANU has many more beaches than BVI and less bluffs and islands to snorkle, but no matter where you jump in there is always stuff to see. Give my friends Al and Jackie an email at Horizon Antigua, Jolly Harbour is a great spot to provision and hang out, but it is more South Florida feeling than the Caribbean.

There are also options in ANU to hit other islands, but unless you have a long charter, I would stick with Antigua and Barbuda.