I honestly like both, depending on the movie. However I have to say that since my favorite movie is Star Wars, I like science fiction better.
I LIKE SCI FI BETTER BECAUSE I,M VOTING EVIL ROBOTS OVER SCARY SNAKE
vulcans are WAY cooler than hobbits
LoTR and D&D, amongst other fantasy novels, movies, and shows are IMO just better stories. More mystical.