There have been lots of good Canadian shows, but I can't say I watch any currently.
As a child, I enjoyed Friendly Giant, Mr. Dress-up, Fred Penner's Place, Today's Special, Polka Dot Door, Romperoom.
I always like the Littlest Hobo as well. Other popular Canadian shows were ENG, Traders, Blue Shield or Blue Murder. There are other shows that look like American shows, Sue Thomas FB Eye, Andomeda, Stargate.
Canada really doesn't do sitcoms and when it does to shows, most pretend to be in the US, why dunno.