See the Season 1 disc for a more detailed review of the series - The best of Season 3 + Season 4 feature some of the best episodes in the series. Joyride has one of the greatest one liners ever from Rocko that alone makes this worth getting.
I'm convinced that it's one of the greatest comedy series of any genre on broadcast television. Top notch writing, acting and directing. Just to give you a sense of my comedic sensibilities I would also put Strangers with Candy and The League of Gentlemen in this realm as well. If you like dark dark comedy - you can't go wrong with this series.