I have a poet friend who likes to ask people for 5 of their favorite words, then try to write a poem using them. It always makes something pretty neat.
I love the feel of certain words in my mouth the way I love the texture of certain foods. When I was a teenager, I loved the words maelstrom, whimsy, and vector.
Right now I really dig the word chrome. I don't choose them because of what they mean, just how they feel in the mouth.
I was so fond of the sound of the word lurid in my 20s that I legally changed my last name to it for about 18 months. I was kinda goofy.