Not a lot of celeb encounters, but Malcom McDowall, John DeLancie, Levar Burton, Nichelle Nichols, Judson Scott and Catherine Hicks were all friendly and gracious when I briefly swung by their tables for autographs. McDowall seemed pleased that I remembered TIME AFTER TIME. And Eddie McCormack of Warehouse 13
happily signed a copy of my WH13 novel for me.
Had a brief conversation with Ben Browder of FARSCAPE at a convention many years ago. He was obviously well-versed in science fiction literature, so I sent him a care package of selected Tor books and got a nice thank-you note back in response.