I would not have thought you felt this way.
I listen to rush whenever my schedule allows it, generally about 7ish hours a week (of 15 hours of programming)
I can tell by the comments that the majority of "rush haters" do not listen to him.
Often his comments and thoughts are taken out of context, and he is far less a cheerleader for the republican party than levin or hannity.
Rush makes no bones that he is an entertainer and he does what he does and says what he says to make money.
He gives very thoughtful political insight and as TPS says presents angles that are both often correct and outside of the mainstream thought.
Does he have a bias against Liberals? Yes, he disagrees with the policies.
He takes issues with the republicans when it may be unpopular with his fan base to do so, but of course he will ultimately always side with the republicans because for a conservative the Dems are just not an option.
Rush's biggest problem (IMHO) is his huge ego. which can easily get tiresome of listen to, but being a listener, and someone who agrees with limbaugh on multiple issues (not all personally) does not make you "brainwashed".
Nor does defending him...
I thought lazybones did a good job defending himself from the masses in the other thread..