I am a fan of movie adaptations of my favorite book series, (the good ones) especially the harry potter series, it will always have a special place in my heart.
I really enjoy ATLA, or Avatar: The last Airbender, because I love the worldbuilding and the character arcs in there, and how the magic system works. I also am a huge fan of the She-ra remake, because of the characters, and their dynamics with each other. My favorite character is probably Entrapta.
Well, my favorite books are more "mainstream" series, if you like to think of it like that, for example, I grew up reading Harry potter, The Hunger games, Chronicles of Narnia, Percy Jackson, Fablehaven, and Beyonders, to name a few.
My all-time favorite authors are probably J. K. Rowling, and Brandon Mull, because I love the creative worldbuilding they do, and the Beyonders series is one of my favorites of all time.