There aren't too many shows that I dislike, but not too many that I have to watch every episode. I've always enjoyed Curb Your Enthusiasm, Family Guy, The Shield, It's Always Sunny In Philadelphia and most times Survivor. Also, I miss the reality show 'The Mole'.
The one show that I really just don't get, and I'd have to say is considered one of the most popular, is Two And A Half Men. I have yet to snicker or chuckle once during that show. Maybe I just find it too predictable. A close 2nd would be Big Bang Theory.