In my experience, the whole "it always rains in Seattle" is just proof that the Seattle marketing department have never visited Manchester :-) although I don't know if I've visited this early in the year. Summer and autumn seemed to provide generally better weather than I'd expect in North-West England. The Experience Music Project would be my must-do in Seattle - really well done history of the electric guitar exhibition, and lots of music stuff to play with: try your hand at mixing; sing your heart out in a soundproof booth; pretend to be in a band at a stadium gig... we assumed a couple of hours would be plenty of time but only left because the place was closing for the night! Pioneer Square was quite a good area for restaurants and night-life, plenty of bars/restaurants with live music, that sort of thing (although I haven't been to Seattle since I left Microsoft in 2002, so things may have changed...) The Microsoft campus is in Redmond, the other side of Lake Washington. There's not much else over in Redmond really, but there are quite a few buildings for MS. None that really stand out as worth visiting, as I recall... I guess you might want to pop into the company store (if you can get in, I don't know if it's employee-only or not) and get a Microsoft pen, or t-shirt... ;-) The visitor center is probably the main tourist attraction, and if you can get access (again, I don't know how easy it is, or whether it's part of the visitor centre) then the Microsoft Home smart home tour is a fairly interesting glimpse of a possible future for our houses. Whatever you end up doing, I'm sure you'll have fun. Seattle is a really nice place to visit!