View is pretty good from all over. No blocked vis seats that I've ever heard of. Depends on your personal preference.
I prefer the 300 level, sideline "TV view" seats. Others like end zone. But even from corner seats, you can see pretty much the whole field. And it's not really far to the field, so you can see the players pretty well and follow the action, except right in the sideline shadow of all the players in the bench areas.
There is an interactive seating chart at Seahawks.com that has views of the field as one of its features. You should check that out.