In small quantities, I enjoy:
Nickleback (older stuff only)
Trag. Hip (again, Henhouse and Older)
BTO
The Guess Who
Trooper
Bryan Adams
Rascals (actually a good live band)
Templar (I wish they hadn't broken up0
The Watchmen (actually, I could listen to these guys ALOT more...)
Big Sea
Big Sugar
CCR
Ones I CAN'T STAND:
Celine Dion
Avril
Shania (for the most part)
Billy (no) Talent
The rest...I really have trouble listening to.
Actually, there's some great local talent to be heard... there was a band I saw recently, who's name escapes me right now... I will post it once I remember... and they were fantastic! Totally had the crowd going too.
Rock and other stuff aside, there's alot of great classical, jazz and "other" artists that kick around canada...people who don't get much (if any) play time.