The Name of the Wind Mistborn and honestly maybe The Martian, i really loved that book. Great pacing and very cinematic in structure.

But this is also an impossible question, because i also consider "best" "favorite" and those terms to be hard to pin down. For example, the films and books I respect more than any other because of the sheer depth of the story and novelty of what they tell, also aren't often the ones I read or watch over and over again. So are they my "favorite" or are the ones I've seen 20 times, and maybe even think are a little stupid in some ways, but love that about them, are they my favorite?

Tons more could make the list that I've loved but only read/listened to a single time; Foundation, Dune, The Moon is a Harsh Mistress, The Dresden Files (silly at times but really fun series), numerous Brandon Sanderson books, etc.

I also find myself diving into fantasy more than sci-fi most of the time. But as is the common trope, "sci-fi is just fantasy with rivets." So hard to say one or the other most of the time, lol