Olbermann -- condescending, pompous, weasely, whiny, clown. Not to be taken seriously. Ever.
Hannity -- tolerable delivery, very little substance, rarely says anything of importance.
O'Reilly -- arrogant blowhard. Probably wears tube sock in crotch.
Beck --Chicken Little, and just weird.
I say turn them ALL off and form your own opinions. Or just read Greenwood Eagle's posts on the pay board. He's as wise a sage as any of the above-mentioned schmucks.