Defiantly a must watch.
Clannad ~After Story~ is a perfect example of normal, everyday hardships and tragedies. It shows how some teenagers, finally graduating high school, try to become an individual of the world and moves out on their own.
This also shows problems and situations we all must eventually face with our own loved ones.
This is a very comical anime as well as a "tear-jerker." You'll become the characters of this story and ride the emotion roller-coaster that they also ride, but in the end, it'll leave a smile on your face.