I live in a similar state Corey, somewhat rural portion of Eastern Washington. Numerous back roads which are wonderful to drive and long stretches of sparsely populated highway. You hit the nail on the head with the passing. I like to be able to pass with impunity as there too many left lane lolly gaggers with a chip on their shoulder when they see a premium car behind them.
Current: 2012 M-Sport 550i X-drive Dinan Stage 2
Gone but not forgotten: 2007 911 Turbo, 2005 911 Carrera S, 07 BMW M Coupe, 07 335 XI, 05 Mercedes R500