I loved the Blue Hole and would definitely dive it again. The follow up dives afterward were the icing on the cake for me "The Aquarium" was amazing and we also hit a nice wall. Those dives were at shallower depths where the sunlight on the reefs was spectacular. Our lunch at the Blue footed Boobie sanctuary was a nice added bonus as well.
We had a similar experience as surreal73 with "The Aquarium" and lunch at the booby sanctuary after which were both very neat. We saw huge grouper and reef sharks right below the boat at the Blue Hole and it was pretty cool to see the huge stalactites at 140'. I'm glad we did it once but wouldn't make a point to go back to the Blue Hole.