My top 5 list:
1) The Inbetweeners - a more realistic version of the 'American Pie' characters, kind of sums up my teenage years
2) Peep Show - a unique first person comedy that I've been watching for about a decade now
3) The Office - the original version, such a great story from beginning to end, and Ricky Gervais is just a genius
Trailer Park Boys - Canada - hilarious situational comedy involving 3 trailer park guys who are always trying to come up with a plan to get rich and 'retire', usually involves weed.
5) Father Ted - UK/Ireland - A crooked priest, an idiot priest and a drunkard priest, classic comedy
Honorable mentions - Kenny vs. Spenny (Canada), Knowing me, Knowing you with Alan Partridge (UK), I'm Alan Partridge (UK), Hustle (UK), Black Books (UK)