10. They are written by an overpaid union left winger
9. Some are just plain stupid
8. Some are not suitable for a family audience
7. Many are designed to sway public opinion to the left
6. Not enough from a center right perspective
5. They can be very nasty to people who are not guests on the show
4. Obama gets a free pass
3. They never do any local topics
2. With all the re-runs they become too stale and out-of-date
1. David Letterman's an old man who still thinks he's cool

