Nice photo set! Been waiting to see these for a while. As your Seattle and Portland sets show, you have a keen eye for all things beautiful. What a great set of cities to have a honeymoon.
As for the notion of Seattle feeling more 'big city', I think the bigger factor is not so much height, but girth. At street level, building height is important for that feel, but if you are walking along streets where building span a whole city block, these big fat buildings just have more of a presence.
I think that's why Seattle has more of that North American big city feel whereas Vancouver has more of that Asian/South American big city vibe, for a lack of a better term.
Anyway, nice to see you got some good views from your hotel! Obviously there's more to come so I am looking forward to that!