Ever been on a cruise ship before? It's like that, except for just one person and their friends/family. The point isn't to get to your destination quickly, the journey itself is half the fun. That's why I always go with the biggest ship I can find with the most on-board amenities. And since everything is included in the upfront cost, it's one of the cheaper vacations you can take.

(Also fuck billionaires and their yachts.)