Wow that's hard for me to work out, but I'll try. I'll also try to keep it short.
Books:
- Tolkein, not just the trilogy, but Hobbit, and his various smaller works.
- Ursula Le Guin, especially Earthsea
- Guy Gavriel Kay, especially Tigana, Song For Arbonne, and The Fionavar Tapestry
- Dune
- Dumas
- Gaiman, especially Neverwhere and Sandman, but also very strongly his short stories
- Stephen King's short stories and The Dark Tower
- Joel Rosenberg's Guardians of The Flame books, and his other series though he finished none of them sadly
- Dragonlance
- Margeret Weiss's other books, like the Darksword Trilogy, Rose of Prophecy, and the Deathgate Cycle
- Mercedes Lackey
- Dragonriders of Pern
- Not really Lovecraft so much as other authors playing in his sandbox. (Gaiman's Lovecraftian short stories are really, really, good)
- Sadly, a many books that I could describe, but have never been able to find the titles of again, that I read as a kid.
Movies and TV
- Star Wars
- Star Trek
- Leverage
- Legend
- Princess Bride
- The Last Unicorn
- Pirates of Darkwater
- Galaxy Rangers
- Avatar The Last Airbender
- Krull
History would be hard to list, but I've done a lot of reading on Medieval Islamic cities and scholars and such, and it deeply informs the worlds and characters I build, as do Norse and Celtic history and myth.