I find fantasy less interesting than science fiction because fantasy tends to be less imaginative: werewolves, vampires, dwarves, trolls, oh my, haven't we been here before?
Science fiction has a different alien intelligent species on a billion planets in this galaxy alone. Tired of Klingons and Vulcans? Then let's go to another planet and meet someone else! And there are billions, trillions of possibilities!
Even the architecture of science fictional cities is different: underwater cities, cloud cities, space cities. Fantasy is forever bogged down in medieval villages with a castle on the hill.
In that castle I'll bet there's a dungeon in the basement, with chains and cuffs on the wall and giant spiders in the corner dangling above skulls. And in the tower of the castle is the wizard's loft, where he's casting a spell to bring a statue of a demon to life . . . yawn.
One of the most popular and widely praised Terry Prachett books of recent years is Going Postal, which is about a fantasy-world attempt at a telegraph system. Not an 'Internet-like' system as his fans claim, but a freaking eighteenth-century semaphore! This shows that even a towering figure in the fantasy field such as Prachett was running out of genre-specific ideas and had to raid science and technology to keep the creative juices flowing.
Fantasy is for people who want to think of themselves as 'creative' and open to new ideas. So they revert back to fairy tales that their ancestors were listening to round the tribal campfire for thousands of years.
Got news for you fantasists. The lights in the sky are not little dots, they are not lanterns, they are not fireflies, they are not burning cigar butts. They are suns, and a sun is not a smoldering ball of dung, it is a globe of atomic fire a million times bigger than the whole Earth, and each star is such a sun, with circling worlds as vast as our own, and for every star that you see there are countless that you can't imagine.
Well, Mr. Imaginative-Creative Guy, here's your sword and bow and quiver. Good luck fighting the dragon and finding those treasures, I'm sure the quest won't be easy. I won't worry about you encountering some concept that will blow your mind, however, because I know that where you're going, there's no danger of meeting anything that will remotely expand your consciousness of what the word 'infinity' actually means.