It's easy to underestimate Gintama. If you watch only a few episodes, it's easy to think that this is just a simple typical parody series that offers very little for the amount of time invested to watch the series'. But if you stick with it, you'll see that this initial view-point is so far from the truth. There is a underlining storyline that rears its head every once in a while, and when it does the series notches up to a whole new action-packed higher level. The series is still ongoing so how it will all end will affect the overall rating for this series, but what I have seen so far has been enjoyable to watch - especially the references to other anime.