1. Ouran High School Host Club
2. Durarara!!
3. Death Note
4. Gurren-Lagann
5. Hunter x Hunter (2011)
My other favorites are DBZ Kai, both Fullmetal Alchemists, .hack//SIGN, Casshern Sins, Rurouni Kenshin, Shin-Chan, Big O, Sailor Moon, YuYu Hakasho, Magi, FLCL, Cowboy Bebop, and both Stand Alone Complexes (though I prefer 2nd Gig.)