My 727 flights generally occur on shorter routes in the Western United States because the scenery is spectacular. Going from KSFO to KLAX you have ocean on one side of the plane and beautiful landscape on the other side. Nevada deserts are nice as are flights into Denver over the Rockies. Any approach into Salt Lake city brings up beautiful scenery as well. The FSX detailed scenery around the Seattle area makes for great flying. I think MS focused on the Seattle area a bit more extensively in development being this is their home turf.