I love so many of the animes I watch it's really hard to choose favorites. If I had to choose a favorite it would probably be Naruto Shippuden when it doesn't have a load of fillers. I also love Death Note, original Naruto series, Black Butler, Black Butler 2, Nabari, The World God Only Knows, Soul Eater, Code Geass, Bleach, Dragon Ball Z, and I can't think of any others at the moment.