I love Nassau. We always get off the ship, walk to John Watlings Rum Distillery (15 - 30 min walk) for some of the best Pina Colada's money can buy then back to the ship by lunch!
The regular Nassau things never appeal to us (Atlantis, Baha Mar, beaches, etc.) which is why we try to avoid the touristy things.
We will probably try to limit the amount of time on Castaway to spend more time on the ship since I don't plan to Sail on the Wish again. Less out of desire, more we are getting priced out of the ship compared to the older ones.