I don't think there is anywhere else in the world that makes sailing as easy as in the BVI. I've been to most of the great cruising areas in the world (with the exception of the Bahamas!) and haven't found anywhere that has the combination of pretty much guaranteed good sailing weather, sheltered water, short distances between stops and mooring balls everywhere.

In the Caribbean, only the Grenadines comes close and they still require far more effort and anchoring to get to the best places.

Have to admit I'm surprised by sail2wind's comments about French customs. In my experience they are the easiest as you can fill the forms in online - often just in cyber cafes - so you don't need to actually see a customs official.