Best Incomplete Anime

The world of anime is complex and at times quite frustrating. Some series manage to extend for a long time and produce spin-offs and tie-ins galore. Other series are cut short, either due to quality issues or a general lack of story. In most cases, the anime cannot keep up with the slower pace of the manga and thus deviations occur. Some deviations are interesting and compelling while others can make one shake their head in disappointment.