At first, I didn't really like the show (maybe 7/10), it was just too boring and bland. But as they introduced more characters and developed the older ones, the anime started to get really good. I honestly think this anime has the best character back stories (on the main ones of course) than any other anime I've seen IMO. I especially liked Tomoya Okazaki, Tomoyo Sakigami and Kotomi Ichinose (not so much Nagisa).
Story: 8/10
Art: 7/10 (eyes were exaggerated)
Sound: 8/10
Character: 8/10
Enjoyment: 9/10
Overall: 9/10
Overall, this anime is great and gets the amount of attention it deserves. There isn't many specific things that I would change beside Nagisa's odd personality.