Went to Pensacon yesterday. Saw Katrina Law there. Of all the celebrities I've ever run into (and it's not a ton, but a few anyway) she was the most personable, the friendliest, the most down to earth.
And also extremely hot.
For fans of Game of Thrones, I also had a brief convo with Grandmaester Pycelle in the bar at the hotel next to the event. He escaped autograph duty and was hiding behind a cocktail there.