If I had ten minutes, I would totally spend my time sitting infront of the hub in Magic Kingdom, enjoying a mint chocolate chip cone from the plaza ice cream shop, and just people watching.
Haunted Mansion for me, too. I LOVE the idea of popping into a Disney attraction, and popping back to work, and then singing a tune for the rest of the work day! "When the crypt doors creak and the tombstones quake...."
I'd pick Epcot on a warm autumn (fall ) evening after dusk and before Illuminations is about to start, listening to the music and watching the people strolling around the World Showcase.