Hmm.

Well, I don't have any particular favorite because I do love them all but if you will make me choose one, then it is Naruto and its Shippuden series. I'm not being forced or something but that really is my pick. I grew up watching it from the start and never made me bored to rewatch it from the start until the end more than 5 times. I do watch Boruto too because of it. Naruto is the only anime that I knew before until I tried others that got me interested to watch more anime xD

One Piece, Trinity Seven, Steins;Gate, Chaos;Head, Robotics;Code, Occultic;Nine, Isekai Genres and Magic and many more