More character studies and vignettes than stories, the deceptively simple way they are written is perfect.
The gem of the lot is certainly Breakfast at Tiffany's. In essence the movie was faithful to the story (except the end), but Holly is a crueler and wilder character in the pages, less cute, more vindictive, and all the more tragic for her yearning of freedom and belonging at once. And compelling, like some free animal you could find in a jungle. Holly's own word is that she aspires to be "natural" and it fits.
Christmas Memory and Diamond Guitar fight for second spot, but the first edges over because I'm a sucker for nostalgic little things that contain the world.
House of Flowers was... oddly pretty in imagery, and surprisingly positive in a way. Maybe subverting tropes was the name of the game.