Liked "Count Arthur Strong" for a while, and "Ed Reardon's Week", for a while, but sometimes I think they end up making second, third, fourth series and the comedy content fails to inspire (me, at least).
Perhaps it's a 'freshness' thing that once it gets a bit stale, similar themes are used again with minor variation. Have to say I started off liking "Fags, Mags and Bags", but after a while (and an episode where product placement rules must have been broken - the one where there were lots of complaints about someone smelling bad) it again drifted away from pleasing me, and I switch it off. I think I switched "Down the Line" off in about 45 seconds from it first airing.
"Cabin Pressure" seems capable of far more variety, perhaps because the 'destinations' are many and varied, so more possibility for different and unrepeated stories. "Deep Trouble" (set in a submarine) was great, but I guess they felt there wasn't enough to run to 5, 6, 7 series.
Loads more views, things I liked (such as "Rigor Mortis", "The Consultants", "Genius", "Museum of Everything", "Nebulous", "Old Harry's Game" and "Revolting People") and disliked - anything mentioning "Podmore" or "Shuttleworth" or National Theatre of Brent" !
Can anyone remind me of the name of the series set in a London PR firm where the clients were politicians, mostly?