Day 14, your favorite NPC.
Of all the published, official NPCs, I'm going to have to go with Elminster. Forget all the novels, or the published rules for him. I love the little snippets of text commentary that Ed Greenwood inserted into the various articles and supplements that he wrote.
On the other hand, I've written up a number of NPCs for the blog, and I'm rather proud of them.
The first is the Old Man of the Dungeon. Kind of an Elminster of my own...
I also like Zabaan of the Burning Sands, a wandering high level mage who makes a perfect sage... if you can find him.