Odd time signatures are one of the most interesting subjects in music theory, and not only drummers benefit from understanding them. On one hand, the basic idea is not that hard if you are willing to spend some time with it. On the other hand, some situations can become genuinely complex, especially when odd meter and polyrhythm appear at the same time.
Mike Portnoy is one of the most respected drummers associated with odd-time playing. In this video he demonstrates several ways drum parts can be built around this concept.
Some musicians are scared of odd meters, and others are simply not interested in them. But it is useful to remember that odd time signatures are built from simpler elements. For example, 5/4 can be felt as 2/4 plus 3/4. 7/4 can be felt as 3/4 plus 2/4 plus 2/4. The same logic works with meters based on eighth notes. These elements can also be rearranged. Once you understand the construction, the subject stops feeling mysterious.
Good examples of fairly accessible patterns in 7/8 and 9/8 can be found in Carmine Appice’s Ultimate Realistic Rock, pages 75-88.