Popular with middle-aged couples, retirees and multigenerational families, the “Love Boat” line’s ships aren’t as flashy (or big) as those of Royal Caribbean and Norwegian, and that’s just the way its customers like it. They enjoy the brand’s wide range of itineraries, which include voyages in Asia and Australia, as well as closer-to-home places like the Caribbean. Princess has also been a longtime staple in the Alaska cruise market.