There’s only one thing that would get me back on a cruise ship: the world’s first rollercoaster at sea

Carnival Cruise Mardi Gras has launched

Almost exactly 10 years ago, I set sail on my first-ever cruise aboard the since-scrapped Carnival Sensation and found that “bargain-basement vacation” to be better than I expected. However, after experiencing a few of its competitors, and suffering through a second Carnival cruise full of indifferent service and inebriated passengers, I swore to never again set foot on one of their ships.…