Why is it possible to see this comedy show over and over again, and it is just as refreshing each time?
It doesn't try to be funny, contrary to US 'comedies'. It has the fast and witty unassuming character of the best of the British, but with a distinct Canadian flavour (Britain hasn't got the prairie, at least not when I was there last).

If you're Canadian and haven't seen it, then you must've been living way out in the sticks, and for the rest of the world, it is time to catch up!
I have recommended it to the Norwegian public broadcaster, as an antidote to all the empty-headed, drab US rubbish (very mild description, but real sentiments are censored) broadcast here.
So just give your credit card a mild stir, and get 'em all!

This is really one of the most intelligent comedy shows around, and script writing in the same league as Monty Python. Oh, it is very different, but as quirky funny. And there's no canned laughter, so you will enjoy watching the episodes with regular intervals as each time you discover some new details, as a lot of the jokes are just quiet little comments. The actors are so much 'in character' that I wonder if they'll have problems shedding their Corner Gas persona.
Also, in many respects, Corner Gas shows how different Canadians are to US Americans, and in particular that Canadians' mannerism and sense of humour is much more civilised and sophisticated. (Bias herewith admitted: Canadophile).
The commenting on the three first episodes gives good clues on how much work was involved getting this show to be the sterling effort it is.
The quality of both sound and picture are excellent, and it is played problem-free on a newer DVD player in Europe as well (and then will be in Australia).
Now it is just to get the rest of the series!