Hmm..well I think AnoHana,Clannad,Tonari no Kaibutsu-kun,Angel Beats,Both FMA series' (First series & Brotherhood!),Little Busters!,K-ON!,Fairy Tail,One Piece Girls und Panzer,Tari Tari,Ranma 1/2 and Princess Tutu!
There are many good series but my fav ones are : Naruto, One Piece, K-on, Fairy Tail, Gintama, Katekyo Hitman Reborn! and Fullmetal Alchemist: Brotherhood (Pic) ^^