Ultimate "feel bad" anime

Koi kaze
Mushishi
A Kite
Pale Cocoon
Planetes
Voices of a Distant Star
Angel's Egg
Saikano
Gunslinger Girls
Niea_7
Haibane Renmei

Others, please?

>>7
Watch Grave of Fireflies if you want something really sad and depressing. It's also based on reality except for one thing, but telling that would spoil plot.