Blood & Wine > Hearts of Stone > Base Game
Hearts of Stone offers the best narrative of the three and character writing is top-notch.
Blood & Wine offers you a full game experience with a map that is better designed (a lot more intuitive traversal and far less bland empty space) and more densely packed than the base game, improves the RPG mechanics, has a superior soundtrack, offers a better balance between main story/side quests/contracts without the bloat/excess of the main game (also quests don't take themselves as seriously), and is an improvement ITO tech across the board (improved animations/idiosyncrasy system, better LOD and draw distance plus better environmental textures), and better art design.