In the 7th and final season everything comes together. Most story lines are resolved (Worf & Dax, Kira & Odo, Bashir & O’Brien, The Profits & The Pah-wraiths), but new ones are created (What will happen to Sisko, Kasidy & Jake)
All characters have a chance to shine in this season, even the so-called supporting actors (Dukat, Kai Winn, Nog, Garak).
I found the seventh season one of the best season, only just second after the amazing season 5. There is not a single weak episode.
The extras are fine too, with the last 3 crew dossiers (Sisko, Jake, Ezri), and 9 section 31 hidden files devoted to the supporting characters. The only thing I missed was a file on Garak. There was also a feature on the filming of the last scene and the farewall party, which was nice.
I was a little sad at the end of the last episode, but fortunately I now own the entire series on DVD, so I can watch it again and again and again.