Over on Ann Althouse's blog, she has a topic regarding favorite buildings. I did something rare and commented (I think for the second time ever). (What? I'm shy!)
There is one building I didn't mention, mostly because it's a little embarassing. I have always, always loved the clock tower facade on the "It's a Small World" ride at DisneyLand. I remember it being so bright and shiny in white and silver and gold. The last time I was there (around summer '97) I was very surprised to see how very colorful it was. I don't know if I misremembered or if it had been repainted, but I was still in love with it.