"Really the topic of breakfast cereal is generally a very boring one"

This quote by Joshua Homme indicates that the subject of breakfast cereal is generally not an interesting one. He is suggesting that the subject is ordinary and uninteresting, and that it is not something that individuals would normally discover exciting or stimulating. This could be due to the fact that breakfast cereal is a common food product that is consumed by many individuals daily, and for that reason it is not something that is especially distinct or notable. It could also be since breakfast cereal is a fairly easy food product that does not have a great deal of range or intricacy, making it a less interesting topic of conversation. Ultimately, Joshua Homme is recommending that the topic of breakfast cereal is generally not an exciting one.