Why I think Seattle sucks
Weather: I think that most people who move to Seattle are already aware of its reputation for gloomy weather. Being aware of it and living with it, however, are two different things. People really aren't going to know how prolonged periods with little sunlight will affect them until they experience it firsthand.
People: Seattle seems to have a very high number of not just passive-aggressive, but covert-aggressive (big difference from passive-aggressive) people here.
Overall poor quality: What isn't just cheaply slapped together in Seattle? It seems as though things are built shoddily and then left to decay in the elements here.
This isn't to say that there are absolutely no decent people in Seattle, that there are never days with nice weather, or that everything built here is a crumbling pile of shit.
On average, however, there is enough evidence on the above three negatives for me to conclude that Seattle is a shithole. What's worse is, when you live here, you hear these morons, most likely high to the gills on anti-depressants, gushing about how great they think Seattle is.