This Simpsons are my favorite show of all time, and this season is no exception. My parents gave me this season for Christmas, and it's downright great. Like the previous 8 seasons, it's filled with celebrity guests (one of them happens to be U2), funny one-liners, and plenty of "D'ohs" from Homer. In this episode, we get to see Homer's beef with New York, Lisa finding an angel in a construction site (which turns out to be a publicity stunt), Homer entering the navy, and even Apu getting married (who eventually cheats on later in the series)! This season also introduces Dufman and Gil, 2 of the best "side" characters in the series. In the Halloween episode, we what Homer does when he finds out he's the last person on Earth (which is dancing around nude), what would happen if Bart's body got switched to a Fly's, with his body having a fly's head after a failed experiment in teleportation devices Homer bought at Professor Frink's yard sale ("I'll teach you to mess with my machine!"), and we're finally taught that Marge IS a witch ("Well I'll be a son of a witch!")! My favorite episode on the season, though, would have to Simpson Tide, where Homer becomes in charge of a nuclear sub ("it's pronounced nukular!"), and uses Bart's ear piercing to plug the leak in the sub (Bart: "Didn't you ever do anything outragous when you were a kid?" Homer: "Well, when I was 10 I pierced my ear, but this is completely different!").
Overall, get this if you're a Simpsons fan. It doesn't top my all-time favorite Simpsons season (Season 3, but of course, nothing will), but it's still awesome.
P.S. Can't wait for Season 10.