Sure, cruise ships may all look alike when you’re browsing the line websites. But they aren’t actually all alike; as with hotels, lines have their own personalities, strengths, and weaknesses, and you have to pick the best cruise line for you. Disney Cruise Line, for example, often offers fares that are very similar to those of Celebrity Cruises (pictured). But while Disney serves boisterous families with young children best, Celebrity is the better choice for empty nest and retiree couples looking for a quietly chic experience. The prices are comparable, but the experiences are very different, so it pays to do your homework before plunking down your deposit.