Reply #2: You can't really argue between the two, though:

[Todd B]

And this is just a hunch, here:

You find left-wing hosts funny because they are generally poking fun at right-wing politicians - just as those who lean to the right would find Rush or Hannity funny because they would generally poke fun at left-wing politicans.

I'm sure that if someone who leaned to the right listening to Stephanie Miller or Randi Rhodes they'd say the same thing you were saying, except about the left wing hosts.