Have you not watched this yet? Go watch it nao. I personally recommend UTW(Chibiki). They never got around to releasing a batch so it's all single torrents right now.. but it's so worth it. It's 25 episodes long, and I liked every episode.
It's touching, it's got lots of singing, the characters are lovable, etc. Halfway through the series picks up some nice pace and there starts to be lots of songs. About ~80% in I bawwed for a bit. Not clannad train ride levels of baww.. but it was definitely worthy of tears.