Definitely "Hunter x Hunter" – it's so creative and innovative, with an amazing combat system and a huge range of unique powers. I also love the characters – there's a real emphasis on strategic thinking and problem-solving, which I think is a lot of fun to watch. The animation is also great – it's really fluid and dynamic, with some really cool action scenes. And the story – it's just so epic and sprawling, with so many twists and turns. Just an all-round incredible anime series!