I am perhaps the wrong person to be asking, because I don't watch a lot of drama or comedy, Canadian, American, British,or Australian, and I also watch Quebec shows at various times, including some comedy series of a few years back in French such as "Victo Story" and "Chicken Swell", despite the names.
I have no regular fare, but did use to watch "Da Vinci's Inquest", in my beloved Downtown Eastside of Vancouver, and its streets made for gritty fare when compared with elsewhere in Vancouver.
Sure, it is great to just sit back and laugh, but I can watch Canadian standup comics on the Comedy Network, ("Time Well Wasted"), and they are often quite good, especially some of the up-and-comers as opposed to some of the guys who suffer from being a big fish in a small pond,ie-overexposure.
There are shows on other networks that have loyal followings, think of "Falcoln Beach" on Global or "Whistler" on CTV. They may be soap operas, but "Whistler" mentions local towns and you get sort of an "O.C" feel for the ski and snowboard set, but I haven't been watching closely.
I did watch the Quebec mystery drama series "L'Or" (Gold) and fantasy drama series "Grande-Ourse" (Great Bear, or Ursula Major, as in the constellation) and I really enjoyed both although they came on late in the night. They had some comic moments too, it wasn't all straight drama or mystery, and were set in frontier towns in Quebec of the kind that I had been to in the distant past.
"Corner Gas" and "Little Mosque On The Prairie" are hits because they appeal to a segement of the Canadian television market that has been largely disenfranchised- I mean, what else has been on the prairie but "Little House On The Prairie", and the times have changed since the 1930s even on the prairies, brothers and sisters!
Even "Trailer Park Boys" appeals to people who know people like that, or like the "loveable loser" appeal of the show. It doesn't sound like the CBC, at any rate. I mean, there are shows such as "The Rick Mercer Report" which can be fun at times, too, and I loved his skewering of "The Pit Pony" type of historical drama the CBC ususally does.
I am old enough to remember "Razzle Dazzle" and "The Forest Rangers", and our production values have gone up since then. We may not have the big budgets needed for some productions, and has anybody thought of all the Canadian actors on American TV series these past few seasons? There are tons of them, from the most highly rated ("24", "Grey's Anatomy") and "Crossing Jordan" to stuff on YTV like that one about high school students in Montreal, or at least Quebec, that has a duo who remind me a bit of Snake and Joey in "De Grassi High" of years back.
The difference is some relatively guilty pleasures are on TV, like a "King of Kensington" for the prairies, whereas "SCTV" and the Lorne Michaels type of shows in New York have marketed Canadian talent in comedy mostly to the East Coast, and even in LA, Canadian actors network with each other. As well, my sister went to school with Mike Myers and Eric McCormack in Scarborough, who have both found their mark in Hollywood .
There is far more choice in Canadian-produced TV fare, even former cartoons like "Kevin Sullivan" which was an adult cartoon, with crude language and what on the Teletoon Network, produced, I think in Montreal, and there are other cartoons that are Canadian-produced, but so much work these days is farmed out- "The Simpsons", to cite a US comedy, is drawn in South Korea!
Our shows take some time to find an international audience, and by then, they are usually at the end of a five-year run. But it is possible, in the US and elsewhere, to market Canadian shows.
Having some Canadian networks with edge such as Showcase, and film distribution companies, might help in the long run against homegenic American programming, and avoid cases such as my brother, who thought "The Brady Brunch" was reality for a long time!