I've not responded to this thread seriously before, but Missy's post made me realize that my top 5 are:
1. SpottyDog
2. SpottyDog
3. SpottyDog
4. SpottyDog
5. SpottyDog
He consistently has the most interesting, heartwarming, inspiring, thought-provoking and humoroous posts. The smilie I would use to describe him: