Just out of curiosity which categories did you feel they fit into? I mean yeah they have had the Seahawks number. I can give that one, but I haven't seen much hatred said by their org or players towards Seahawks before. Lets be real they don't have much of a fanbase in general to cause drama with our fanbase. When I said they're always winning, I was talking more like...championships. They won one in recent memory, and that's about it.
Now under Fisher, I think it may have been a bit different. There was A LOT of extra after every play on the field. But I think that kind of stopped with the new seahawks and rams regime.
They fit into 1, 2, and 5. Even though they're not a dynasty, they just find a way to keep winning, when it seems like they shouldn't. Like when they beat the Bills, or the fact that, for the last 2 seasons, they've made the playoffs after being under .500 at the bye.
Them being a division rival just automatically makes their fanbase not mesh well with ours. I'm not gonna say it's at a level where they would fit into your 4th point, but both fan bases clearly don't like each other.
And you've confirmed the 5th point, they have had our number, even during the Fisher years. It was annoying to see a bad team like the St. Louis Rams beat the Seahawks during the L.O.B years, and with a different coach, they've only gotten a lot better.