maybe because I've only tried two countries so far, but canada is reallly good. People usually overlook YYZ, YUL, YOW, YVR, YEC and more big canadian cities. These are usually ignored by other players, so high demand routes like YVR-YYZ (2500 Y class) YYZ- YOW (1700 Y class) LHR-YYZ (2000 Y class) YUL-CDG (2300 Y class) are real money makers.you have all the big american cities within 737 range, and your more eastern cities can reach europe in 737 classics.