I have to say I mostly look for good character ideas from stories, movies, and books. What if Johnny Knoxville and his JackA$$ crew ran the shadows of Redmond. Pulling off outrageous capers trying to top themselves and maybe posting it to the shadow boards. What would happen if the PC's had to square up with them, could they survive a prank war? Stuck in a rut on villians? Break out Ming the Merciless, the Fatman from Maltese Falcon, Grand Admiral Thrawn, Scaramanga the man with the golden gun, or Jesse James. Good characters make good stories. I have been using the world from that Tom Cruise future crime movie with some obvious modifications for the setting pieces. The characters are what give it life and finding them is the funnest part.