vashdaman said:
As for Clannad I've never actually heard of it, but my very brief google search didn't fill me with hope. Wasn't it based on a video game, and doesn't the maker of said video game usually make erotic games? Then there's the creepy looking school girl with insect anntenna's, and then theres this picture:
It's half and half for Key/Visual Art's.
Clannad Afterstory is top 10 on MAL(4), ANN (2), and the one that you use to search for fansubs(7). Not surprising it placed high, bit odd you haven't heard of it.
Where were you last decade. Eroge adaptations have been growing hugely, there's 100+ almost all post 2000, and several very highly regarded (Kanon, ef, Fate/Stay Night etc.). Compared to 150+ based on bishoujoge in general (50 without adult content in the original).
Pleanty of good anime based on eroge. Even more are made by the same staff.