I never get tired of Sailor Moon, Ranma 1/2, Lovely Complex, Hana Yori Dango, Dragonball Z, Tenchi Muyo, Outlaw Star, Cowboy Bebop, Kare Kano, Fruits Basket, Bleach, Naruto. If I re-watch these anime I get so happy again. They are just as good when I watched them the very first time.