We were at Dreams Puerto Aventuras back in Feb. this was our first time to Mexico, and we loved this resort. Small, but high caliber, you don't have to walk for 15 minutes to get to the beach, its right on it.
There is a marina 5 minutes walk away, there are markets, and a dolphin show/swim, loads of small fishing charter boats, Golf course, etc.
It is pretty centeral along the east coast between Tulum and Playa Del Carman.
Xcaret is a short bus drive away. As are the Tulum ruins.
Great food, great room service, wife sayes spa was really good.
great drinks etc etc
There is a decent amount of snorkeling on the beach out infront of the resort It is sheltered by a breakwater, so loads of fish come in out of the waves
http://www.flickr.com/photos/rossmct...7623423282094/
Not much for corals, but tangs, puffers, rays, baracuda, etc.
Google Earth:
http://maps.google.com/?ie=UTF8&ll=2...05364&t=h&z=18
Hotel website:
http://www.dreamsresorts.com/drepa/photo-gallery.html
No, I'm not affiliated with them, but I'd go back there in a heart beat.