My wife and I have never cruised before, and it is not terribly likely that we'll cruise again soon. This method of travel was mostly irksome to both of us - we vastly prefer to get away from "touristy crap" and on Princess it seems like it's a nearly perfected marketing machine from start to finish chock-a-block full of touristy crap from the charmingly cheese-tastic to the horribly tacky.
I should mention too that this cruise was paid for by my parents - it was a cruise for our whole family (there were 6 of us in all - mom, dad, sister, her boyfriend, me and my wife), which is an awesome idea and something we've often talked about doing, but never really tried to do before now. My mother especially is in love with the Crown Princess - I don't think there's any good rational reason for her affection except for a cunning sales job by her travel agent - I suspect there's got to be some kind of booking kickback and no doubt she made a mint from this booking for the 6 of us.
If it hadn't been for my parents making all the arrangements (yes, they paid, they make the rules. That's how it works, usually. :-) my wife and I would have definitely given serious consideration to booking everything on our own from flight arrangements to and from Puerto Rico as well as the shore excursions and tours.