Norwegian cruise ships draw a diverse crowd, though the majority of passengers on ships sailing to the Caribbean and in Alaska and Hawaii hail from North America. You'll find a decent number of people from other English-speaking countries, and smaller numbers from South America and Europe. On European cruises, North Americans still dominate but you'll find more people from the United Kingdom and other European countries. One ship, Norwegian Joy, was designed specifically for the Asian market, and the vast majority of passengers on this ship will be from China.

You'll find plenty of young families onboard Norwegian ships, especially during holidays and school breaks. However, the line's newest ship, Norwegian Bliss, is less family-friendly than the line's other ships, with all the kids clubs on the lowest levels of the ship and onboard entertainment that is decidedly adult.

Generally speaking, Norwegian Cruise Line attracts mostly middle-aged and older couples, as well as groups of friends of all ages.

Norwegian Cruise Line maintains a casual atmosphere onboard; during the day, casual wear is the norm.

There's no formal dress code at night either, though most people do change into something slightly less casual for dinner. Additionally, some of the specialty extra-fee restaurants do require long pants, collared shirts and closed-toe shoes. Most evenings you'll see men in dark jeans or khakis and collared shirts, and women in blouses with slacks or skirts, or sundresses. Don't be surprised if you see people in shorts in the main dining rooms.

Norwegian doesn't have any formal nights, but there is an optional Norwegian's Night Out at least once per sailing, for which passengers are encouraged to dress up. You'll rarely see a tux or gown, but suits and cocktail dresses are not unheard of.

Norwegian ships also typically hold several themed nights (glow party, '70s or '80s, etc.) during a typical sailing. You might want to bring a few appropriate items, such as white clothing for the glow and white parties or bell bottoms for '70s night.

No. Unless you have an all-inclusive dining or beverage package (which you can buy), you'll have to pay extra for most gratuities, specialty dining, room service, all drinks (alcoholic and non, except water, select juices at breakfast, and coffee and tea), shore excursions, visits to the spa and any retail purchases, including photos.

On the newest ships, you'll also have to pay for some of the entertainment options and even some of the top-deck fun: On Norwegian Bliss, for example, the laser tag and go-karts cost extra.

On warm-weather cruises, the main pool is the line's most popular spot onboard. On ships with water slides, ropes courses, go-kart tracks and laser tag, these are also popular and often require a wait of up to 30 minutes or more.

Inside, you'll find activities that range from trivia, bingo and Deal or No Deal during the day to song-and-dance revues or Broadway shows in the theater and live music or cabaret shows in the evening. Norwegian ships also have a lively bar nightlife. There's also an always-busy casino, which opens when the ship is out to sea.

Best for: Active families, picky eaters, and couples/groups who love to bar hop

Not for: People who can't stand crowds, or those seeking a relaxed onboard environment