I never thought about a liveaboard... Cuan Law looks awesome. I will do more research thinking on that but it seems like I might go stir crazy?
I spent 5 days on Cuan law once (for my Dad's 70th birthday celebration), and it was really excellent. It is a huge boat, and you moor somewhere different every day (there are over 70 islands in the BVI, all packed fairly close together). Apart from the diving, they also have a huge range of "toys" to play with - two hobie cats on board, half a dozen kayaks, plus two ribs with all the water skis, inflating tyres and other towing things you can imagine. It was an absolute blast.