My prized possession is named Harley.
I love my beagle!!!
Super cute. As far as I am concerned, I guess my most prized possession is my memory. It ain't exceptional or anything, it's just the moments, good & bad, that I can carry and playback at any moment (ie bored at work/at a redlight/ at a boring party and so on).
As far as the material things are concerned, my uMBP is one thing I do like. As well as a special watch (not a Rolex, a Timex), because of its sentimental value.