Yojouhan Shinwa Taikei, Aku no Hana Recommendations
Different is better. As soon as something comes along that isn't a harem and/or doesn't have generic moeblob character design, BEST ANIME OF THE SEASON! For better or worse, this is ALWAYS how it goes. In the case of Tatami it's highly regarded across the board since there wasn't any manga artwork to disregard for the purposes of ART. Aku Hana is FAR more of a love/hate series; people familiar with the source material generally disliking it and people unfamiliar often labeling it as the best anime of the season.
The approach of both series is, simply put, style over substance... and cheap over expensive. Aku
Both are extremely unique anime with a non-traditional art style. They stray away from most of the cliches out there and stand out among the never-ending supply of moe anime that come out every year.