Nature Lovers: If you're active, age 45-plus, and shop at REI, Eastern Mountain Sports, or L.L.Bean, you'll feel right at home on these ships. Just mellow your expectations to soft (rather than extreme) adventure. Nature-loving kids will like these cruises, too, as long as they can keep up with and converse with adults.
Noncruisers: A lot of the line's passengers swore they'd never cruise. But off-the-beaten path routes in places such as Alaska, Hawaii, and Baja California reeled them in.