Heyyy alright I just moved out here a month ago!
Anyway, I'm coming from Philly, and there are definitely differences...
1. The people here are friendly. I don't get it. People are NOT friendly in philly. When I step into an elevator with strangers, I stare at the ground. I don't make small talk. Seattle people do.
2. No one jaywalks. In Philly that "don't walk" sign was merely a suggestion. Here they follow it to a T, it's weird
3. MODERN HIPPIES. They all bike or take the bus, they have 2 recycling bins, compost, AND trash cans in every room. Strange.
4. They can't make a cheesesteak to save their lives (probably not much of an issue for you)
5. Emo glasses everywhere
6. I see ads for payday loans EVERYWHERE, stores too. I'm thinking Seattle people spend too much time worrying about the environment, not enough worrying about their finances
7. The sports fans are pansies. I went to a Mariners/A's gam, got drunk and started yelling about the Phillies and no one even gave me a 2nd glance.