Notice: You should not expect too much from this like I did simply because its producer is the same as Clannad's, so here goes my first attempt... to tell people why I think this Anime is so so bad.
Story:
The story in an overall view does not connect at all, it feels like the plots are just randomly put together. Even if there's supposed to be a sad scene, the transition is so bad that the plots cannot bring up the full feeling at all. My dedicated friends said it is supposed to be game-style plots, meaning this Anime goes the same way its visual novel (game) do, that tells us where its randomness comes from. This I think is why Little Busters is REALLY REALLY sad (bad)!
Art:
It's really nothing to say about art after seeing how the story was, but overall the art has only a few points to praise about. The Moe of course is most people focus on. Even though the feelings are not brought up properly, at least the art was more or less on the spot. You see, the average quality of art may just be the thing that pushed me to watch LB for 17 episodes.
Sound:
Well... maybe it tried to be like Clannad or not, it did an okay job to use some good BGM to bring out the mood/atmosphere here and there as it is supposed to. All I can say is, Little Busters... This Anime... it really has tried its best doing things right. That's all LB tells me as I watch the Anime.
Character:
Basically, the introduction of different characters are just simply RANDOM. Little Busters does not provide a good background telling you how each character came to be. It does not tell you in enough details that why it is important that this group of people got together except probably one simple scene in the whole 17 episodes. The interaction between characters, the lines they say, seems to be completely random and off-topic to me as well. This Anime does not seem to be organized at all in its characters as well. The behavior of the characters is also not supported by anything, even a simple background would do, but there was simply no such thing. In other words, characters are just as confusing as the story.
Enjoyment:
Don't think I need to say more about enjoyment. This randomness of story with randomness of Moe kind of create an Anime that is just below average or further below average. I have not been disappointment in a while now, considering I expected a bit since it's a Key production. I did not understand what the producers were thinking, putting this Anime out here to be judge. People would like this simply because it's plain (probably ignoring the randomness of this Anime) and it's somewhat slice of life, but an unorganized Anime is just... no good to me, I won't enjoy it.
Overall:
I would not recommend this Anime. It's not even enough for a time-waster when you run out of Anime to watch. You may just get annoyed as much as I did as the Anime progresses more and more... wait, is there even a progress at all?!! Lol Be aware of this work. If you expect this from Clannad perspective, you will be upset even more because it's nothing like it. If you do not put up any expectation from referencing Clannad, you will be disappointed just a bit less. Regardless, do not expect too much from watching Little Busters.