Season 6 was really the end of an era, before the Daphne-Niles romance became more than a one-sided infatuation and, although it provided emotional gratification to the show's fans, it sapped some of the show's energy. Bulldog was also soon to become a bit-player on the show, too--I'm not sure why. In addition, Frasier was shut out of the Emmys for the first time ever (it was defeated by Ally McBeal). At least we can be thankful that David E. Kelley wasn't involved with Frasier, or things would have detioratated much faster. Frasier, at least, ended strong last year.
The sixth season had more than a few laughs. Initially, Frasier was unemployed after KACL converted to a Latino-music station. One particularly funny episode was "Frasier's Curse", which had the unemployed Frasier trying to strike an upbeat note while awaiting a high school reunion. Frasier eventually does get his job back (sadly, Bulldog doesn't). Another highlight is a visit from Cheers' dense bartender Woody, which serves as a reminder of where Frasier actually began. "IQ" has Niles and Frasier settling the score on which one is smarter, but the best episode of this season is "Dinner Party." In this real-time episode, Frasier and Niles decide to throw a dinner party, but the planning goes awry when one of the guests makes a disparaging remark about one of the brothers. It's very clever, although it doesn't exactly take advantage of the entire ensemble.
Ultimately, this is a happier season than the last one, but it has the usual quandries and issues for Frasier and his family and friends (and we wouldn't have it any other way). This is still the show on the top of its game, before the 7-8-9 seasons' gradual erosion and the last two seasons' remarkable recovery. A worthy buy.