#26: Who or what was the most memorable NPC you've ever encountered? Why?
That'd be my version of "One-Eyed" Hank Ketchum. Again, I'm going back to my classic Deadlands campaign. He ended up being in Veronica's character, "Black Widow" Beth's, background as the guy who recruited her. I brought him in as a one-off to kick off the campaign. He was well-liked by the group, so I ended up making him recurring.
He wasn't one of those GM characters that stayed with the group or anything, but he did show up now and then to give the group a mission or nudge them in one direction or another. I never had him saving the day or anything--that's never fun for a group when a GM character has to bail them out all the time.