If you have not seen this anime yet, find the time to watch it. It will be hard. It will break your heart and tear at your will. But it will be worth it. I have never witnessed anything so beautiful in my life. This anime changed me. -- Clannad/Clannad: Afterstory
Clannad- Feeeeeeels SO MANY FEEEEEEEELS
Clannad After Story ranks first in this list, as in I have never cried so much watching an anime, and yet I would watch it over and over again, it's a beautiful series.