If you look at my huge collection of fanart sketches and inkwork from my middle grade, high school, and college years (Ages 12-18), just about the only characters you'll see are from Final Fantasy (my favorites being IX, XIV, and Crystal Chronicles), Disgaea: Hour of Darkness (I have SO MANY Laharl and Flonne drawings!), The Legend of Zelda (Link was one of my first action-pose references I would practice with in the super early days. Wind Waker and Twilight Princess were my favorite.), Kingdom Hearts (Naturally), Tim Burton's Nightmare Before Christmas, D. Grey Man, and Death Note.
Those are probably the stories that had the greatest impact in my life and my storytelling/style preferences. I found some early sketches of Xavier and Willow (she had originally been named Dusk, apparently) dating back 2006 that I'd forgotten about and uncovered recently. The art style for them is vastly different than what I do now. But it's interesting to see the similarities in my darker style from back then to the more elegant gothic designs I do now. Either way, looking back through my preteen and teen sketches points to a very clear path leading to my most cherished inspirations I adored in my childhood.
Which, I'm noticing after writing all this, doesn't actually mention any novels or shows or movies... I guess I was mostly influenced by video games and anime.
BUT! Some books of note that I absolutely loved growing up: The Dragon and the George, Harry Potter, Series of Unfortunate Events, Artemis Fowl, Godfather Death (yes, the fairy tale, it was one of the first stories that stuck with me), and a WHOLE bunch of Discworld books by Sir Terry Prachett (Mort and Hogfather being my favorite of those).
Some shows: Avatar The Last Airbender, Gargoyles, Dragon Tales, Sailor Moon, DBZ, One Piece, Air Gear
Some Movies: Disney's Sword and the Stone, Quest for Camelot, Princess Mononoke, Castle in the Sky, Anastasia, Black Cauldron, The Secret of Kells, The Secret of Nimh, Little Nemo