Having spent most of my adult life alternating between the East and West Coasts, and having recently spent a very quick (alas, too quick to be able to catch up with dear friends of mine who live there) trip to my old stomping grounds on the other side of the country, I thought I'd share a few thoughts with regard to the East Coast versus the West Coast.

Northeast: lots of old buildings, some several hundred years old.
Northwest: an old building is more than twenty-years old.

Northeast: In the allegedly suburban areas, the streets are narrow, and the buildings are packed tightly together. Traffic is awful.
Northwest: In the suburban areas, the roads are wide, and the buildings are spaced out more. Traffic is awful.

Northeast: Drivers will deliberately veer into your lane, or accellerate, or decellerate, just to prevent you from executing the turn that you signaled, to the point of intentionally running you off the road and killing you.
Northwest: Drivers will inadvertantly veer into your lane, or accellerate, or decellerate, thereby accidentally running you off the road and killing you.

Northeast: Streets wander around aimlessly, street signs are often lacking, and any given town is likely to have fifteen streets with exactly the same name (such as "Spring St." in Boston).
Northwest: Streets are aligned to a grid, street signs are everywhere, and any given town is likely to have fifteen streets with confusingly similar names (such as "NE 90th St", "NE 90th Way", "NE 90th Ct", "90th Way NE", "90th St NE", and "90th Ct NE" in Redmond).

Northeast: In the winter, the trees all look dead. In the fall, everyone acts as though the Northeast is the only place that leaves change color.
Northwest: In the winter, the trees are all lush and green. Then again, they are lush and green all year long. They are evergreens. Except in the fall, when they change color.

Northeast: Chinese food.
Northwest: Thai cuisine.

Northeast: Dunkin Donuts
Northwest: Starbucks

Northeast: The "Big Dig" was a fiasco.
Northwest: Hey! Let's submerge the Viaduct on Seattle's waterfront!

Northeast: Snow. Cold snaps.
Northwest: Wind storms. Earthquakes.

Northeast: During non-peak travel times, the typical flow of traffic on the highways (where the posted speed limit is 60 mph) is approx. 80 miles per hour.
Northwest: During non-peak travel times, the typical flow of traffic on the highways (where the posted speed limit is 60 mph) is approx. 55 miles per hour.

Northeast: They still haven't learned that highway on-ramps are for accellerating and merging.
Northwest: They still haven't learned that green lights mean, "Go."

Am I missing any?