You'll love hanging out in the bathrooms on Radisson's Seven Seas Navigator and on Silverseas' Silver Shadow. Both ultra-lux ships boast the same wonderful loos! Each and every huge stateroom bathroom has a separate shower stall and a full-sized bathtub long enough for a normal-sized human to fit into without folding up like a pretzel-now there's a cruise ship first! You'll also find a long marble counter flanked by two sets of tall, roomy shelves, and on the Navigator, a generous collection of chichi lemon-scented soaps and shampoos by spa guru Judith Jackson, and on the Shadow, great Bulgari bath products.

For all you thin-crust lovers out there, the Norwegian Sky has got it going on. None of that rubbery frozen stuff here; on the Sky, each pie is made fresh and sliced up bubbling hot all day long. You can even have a personal-sized pizza delivered to your cabin 24 hours a day in a box-just like your local pizza parlor.

Want to pack a lot of partying into a short chunk of time? The 3- and 4-night Bahamas cruises on Carnival's 2,040-passenger Ecstasy, sailing from Miami; or the 2,040-passenger Fantasy, sailing 3- and 4-nighters from Port Canaveral; or the 2,040-passenger Holiday, sailing 3- and 4-night Mexican Riviera cruises from Los Angeles, are all great choices for singles, groups of friends and fun-loving couples who don't want to commit to a whole week. These flashy megas offer lots to do all day long, and their standard cabins are among the largest at sea.

We're talking the Harlequin romance stuff here. Their sleek white hulls and billowing sails will put you right in the mood. Get comfy on board the high-tech, yacht-like 148-passenger Wind Song, Wind Star or Wind Spirit (or the 312-passenger Wind Surf), anchored off the shore of some sexy port in the Greek Isles, French Riviera or British Virgin Islands, and live the life of Riley, with excellent food and service to boot.

As the biggest melting party pot at sea, Carnival attracts all walks of life, including singles. It won't be tough meeting and mingling in the ships' wall-to-wall entertainment and public areas, with their bars, discos, gyms, dining rooms and people-plastered pool decks.

Down with the grown ups! These lines cater to the kids as much as to you! All the lines included here offer supervised activities for three to five age groups for kids between ages 3 and 17. They have well-stocked playrooms, wading pools, kids' menus and cabins that can accommodate three to five people.

Hey, Carnival's vessels aren't named the "fun ships" for nothing. With names like the Celebration, Fantasy and Imagination, what else would you expect! All day long the pool decks are rocking, with tunes playing so loud you'll have to go back to your cabin to think. By night, the party continues into the wee hours in the many bars and lounges, or you can hit the live Vegas-style revues or head for the glitzy casinos, discos or R-rated comedy shows.

NCL wrote the book on theme cruises, and the Norway now puts on seven or eight music cruises a year-from country to blues, big band, 50s and country, including its annual 2-week Jazz Festival cruise-plus a handful of sports theme cruises that have players and Hall-of-Famers from pro basketball, football, hockey, and baseball sailing on board, signing autographs, conducting demonstrations and contests and mingling with passengers.

Hardcore foodies and gourmands have several mouthwatering choices when it comes to the best cuisine at sea. The small ships of Silversea, Seabourn, and Radisson Seven Seas take the top honors. On par with what you'd find at New York's or San Francisco's top restaurants, all produce artful culinary presentations served by ultra-professional waiters who know how to dote. The ships also offer the most extensive wine lists.

Here's the rub: Celebrity's Century, Galaxy, Mercury, Millennium and new Infinity have the best spas at sea. The huge Aqua Spas manage to combine the best health, beauty and fitness regimens with striking aesthetics inspired by things like Japanese gardens and bathhouses and Moorish and Turkish spas. Facilities include saunas, mud baths, massage rooms, Turkish baths, and relaxing waiting areas with padded teak lounge chairs. Each also offers the Rasul (an Oriental therapy that includes applying medicinal mud), a seaweed soap shower, an herbal steam bath and massage, and a dip in the 15,000-gallon thalassotherapy pool (an oversized, souped-up hot tub)-and of course all the facials and massages you could want.

The gyms on the Carnival Destiny, Triumph and Victory are better than a lot of gyms you'd find in your home town. They're dang huge, stocked with more than 40 state-of-the-art exercise machines, including virtual-reality stationary bikes. The mondo spaces are framed in floor-to-ceiling windows and the workout machines are spaced far enough apart that you'll never feel cramped. The two-level complexes include a juice bar, men's and women's saunas and steam rooms and a hot tub.

Cha-ching, cha-ching. If you like spending your idle time at sea leaning on the green felt of a blackjack table or pulling the one-armed bandit, then you're in luck: Today's modern ships boast sprawling, Vegas-style casinos decked out in so much glitz and glamour, with so many bells and whistles, that even Donald Trump would be proud. For the biggest and best, head for Carnival, Royal Caribbean (especially Voyager and Explorer of the Seas), Princess (especially Grand, Ocean, Sea, Sun and Dawn Princess), Holland America Line, Celebrity Cruises (especially Century, Galaxy, Mercury and Millennium), and Norwegian Cruise line (especially the Sky).

Want to pretend your Leo and Kate? Then book a transatlantic on Cunard's QE2. At 31, she's one of the last classic ocean liners left still doing regularly scheduled six- and seven-night crossings between New York and Southampton. You'll dig her long black hull, razor-sharp bow and wonderful tiered decks, and love the gracious British-style service and dining experience. The ship's full of memorabilia from Cunard's glamorous 160-year history, from original oil paintings to trophies, place settings, luggage tags and a neat photo display of the famous passengers who have crossed on Cunard ships.

If hitting balls into little windmills is your thing, you'll love Royal Caribbean's miniature golf courses! Four of its ships-Legend of the Seas, Splendour of the Seas, Voyager of the Seas and Explorer of the Seas-have actual 18-hole putting greens on board. The Voyager and Explorer also have a golf simulator.

Crystal was a pioneer way before the other lines jumped on the Internet bandwagon. Both the Harmony and Symphony have well-stocked computer labs with over 20 computer workstations and complimentary training classes to boot as part of its Computer University program. Computer use is free of charge, except a $5 fee to set up an e-mail account and a charge of $3 every time you send or receive an e-mail up to about seven to eight pages long.