I really like the work of Kyoto Animation. Unique and fantastic art style, perfect music and even more perfect stories. Hyouka almost has all of them. Or to be more precise, it had the potential to have all them.
The plot is nothing complex: Oreki Houtarou, our first main character is an energy-conservative guy, who has to join the 'Classics Club'. He meets our other main character, Chitanda Eru, who is tireless and very, very, very curious. Thanks to this ever-curious girl, Oreki is dragged into many mysteries and investigations, which is, of course, the complete opposite of the boy's lifestyle.
I have the obvious reasons why I like this anime. It's written at the first paragraph: it has the characteristics of Kyoto Animation's works. However, the thing I would consider the best in this anime is, the implementation of the story. Making a show about investigating mysteries can be pretty hard, especially because it can easily be boring and/or unnecessarily complex, especially at the slice of life genre. Luckily, Hyouka manages to remain interesting and entertaining, with the help of its well-written characters. The situations are somehow remarkable and down to earth at the same time. Hyouka is a school example of how to make a slice of life anime, which maintains the interest from the start till the end.
So what's the problem with it? The answer is simple: the length. Hyouka is an adaptation of a light novel series, so it still has stories to...adapt basically. However, there is a great chance that will never happen (unfortunatelly) for obvious reasons. Still, me and everyone who loved the show will wait patiently, if it ever gonna happen.