I've always liked the unique architecture around San Francisco. I'll always love the classic Victorian homes and earthquake cottages, but there are some zany designs out there that just add more character to the city. When I first arrived, I saw a building in SoMa with furniture attached to the outer walls, like they'd been thrown out the windows... turns out it's a work of art that required more than 100 volunteers. Here's a couple fun buildings I've seen recently while wandering around the city:
Hayes Valley (couple blocks from the Aether shipping containers)
(Reminds me of a cheese grater)