i have to say i disagree with this. i think the show has never since been as good as the brandanowicz era and the small, claustrophobic comedy about bureaucracy and small town pettiness. it's become a bit too twee since ben and ann became cuddly and silly.
it's been a steady decline though, and still very watchable. i was - literally - in tears of laughter this week... "... in a cave..."
Interesting point of view, but totally disagree. Season 1 was poor, although it started to find its feet in episodes five and six. Season 2 is fantastic, but I think the show improved once Adam Scott and Rob Lowe came onboard and Paul Schneider left. Mark was alright, but such a dull character. When the show is over, I think we'll barely remember him. Would love to see him do a guest spot though.
Season 3 was incredible, the best the show has done. Think Season 4 was incredible too, and I've loved Season 5.
If we were putting it in order, I'd go 3, 4, 2, 5, 1.