I agree with the above post - except where realistic (such as ORD/MDW, JFK/LGA/EWR, etc.), we should avoid serving multiple airports in the same city. I think we should also be sticking to realistic cities for service. If an airport has no scheduled commercial service in real life, we shouldn't be scheduling multiple daily services there from our hubs. This is especially the case for airports that the game lists with tiny passenger levels...by the time you put in a couple daily CRJ's into an airport listed with 100 passengers, you're suggesting that you will serve an entire year's worth of passengers every day!