As of today, I'm in love with Jhin's gameplay after playing him for the first time. Before today though, I've been in love with his aesthetics, from the very much insane aspects of his personality, to the classical and logical ones. As far as concepts go, his is amazing, and it transfers really well in-game with with his kit, voice lines, movement, and ambiance(such as the humming). Personally, I really like that at the beginning of the game while everything is quiet and you're heading to lane, you can hear him breathing lightly inside the mask(better with headphones), it really gives you that Summoner feel, like you really are seeing through his eyes and not at the same time like a Summoner might. It's also extremely satisfying when he lists off every number in order as he fires, sometimes it'll only be 2 or 1 or 1 and 3 like he thought it and accidentally said it, but the full combo is impactful and improves upon the nice feeling of building up to the last bullet as you execute someone for several thousand damage(Although that's satisfying in it's own right). Honestly, he became my favourite Champion the day I read his reveal, and all the lore, the login music, and his gameplay have just cemented it forever.