the 2 series that seriously made me cry were Elfen Lied (the manga, the anime only gets to about half the story) and Ano Hana.. holy shit those were sad...
and Sorry Gyoin that was my impresion of the show, pretty lame. I guess I can give it another shot some time in the future if you really recommend it that much....
Been watching Kakumeiki Valvrave Season 2... pretty decent (not amazing tho