hi anon! this is a difficult question to answer as i fear that the venn diagram of Books I Like and Books I Think Are Good is basically two separate circles but umm here is the best i can do in the extremely narrow overlap. no particular order:
 
+ lirael – garth nix. i really love the old kingdom series overall (and garth nix is my fantasy writer goat) but lirael has the most special place in my heart. this is the book i started the series with and lirael remains one of the protagonists of all time to me. probably lirael/the old kingdom is to me what lotr is to classical hardcore fantasyheads like this is a childhood and genre defining book.
+ pathfinding! – nicole kornher-stace. a short story rather than a book but i am always coming back to this. one of the love (ambiguous definition) stories of all time, one of the military academy codependent partnerivals stories of all time, one of the approaching the end still believing stories all of time.
+ selkie stories are for losers – sofia samatar. again a short story rather than a book but this kind of changed the trajectory of my life forever. the strength of the narrative voice…!!
+ omniscient reader's viewpoint – singshong. this is the only story about stories ever.
+ changeover – giri nathan. maybe recency bias but i had such a good time when i read this a couple months ago obviously helped by the subject matter being one of my ships of the year SINCARAZ, but i thought it was an insightful overview of their individual and shared histories in the context of the big3 legacy they're inheriting and provided excellent yaoi narrative considerations. instantly a favourite.

if i'm honest at least one night world book is also making the cut but i think my love for that series is well documented enough 😭

here are my top poetry anthology picks too so this list looks less like a scam:
+ averno – louise gluck. I DO NOTTTTT PLAY ABOUT MS GLUCK october is and always will be my ultimate poem onepick of all time.
+ exit, pursued – dalton day. onepick: one-act play in which no knives are used.
+ bright dead things – ada limon. onepick: lies about sea creatures.
+ war of the foxes – richard siken. onepick: the worm king's lullaby.