Variety of routes isn't really a divider between desireable airline jobs and non ~. What separates the most sought after pilot jobs is usually things like pay, retirement benefits, and now in 2005 stability.

When pilots are at the regional level they know their routes are already pretty limited. Once you graduate to a national or major airline level career, you then have a great variety of routes to fly. In my 16 years I don't recall any pilot discussing with me his boredom over the routes he'd been flying.