As you may (or may not) know, I don't often buy anime, but rent from Netflix instead. Clannad is a prime example as to why. In the interest of full disclosure, I decided to give Clannad a go after playing a fan fiction review game at Fanfiction.net. (The goal is to give outside views on various movies, anime, books, etc.) So, I was reading a Clannad fan fic, and was totally confused about what I was reading, and decided I'd give the source material a shot.
Frankly, I don't see the appeal. Oddly enough, Clannad comes from the very same folks who brought us Angel Beats!, and while the animation and character designs are similar, that's pretty much it. I don't generally like to form an opinion of an anime based on just the first disc, but this is easily one of the most boring sleeping pills ever. The plot is completely uninteresting, and the characters flat and hollow, very nearly to the point of being annoying. And I have no doubt the latter would ring true had I decided to torture myself by watching anymore of the series. In short, Clannad boasts deep and emotionally tortured characters, peppered with bits of comedic value, and action. It definitely pretends to be something it isn't, and I don't understand its popularity a bit. As an added annoyance, Netflix lists this snooze fest as having English and Japanese voice overs, when in fact only questionably translated subtitles are provided.
The trailer makes it look interesting, but don't be fooled. This is fan-made by the way and the best I could find.