Rush makes his show entertaining by showing the obvious stupidity of Liberalism and he likes to poke the Left with a stick to get them all riled up. If he just did straight commentary, it would get stale.
My favorite bit on his show is Bo Snerdly doing his “Official Obama Criticizer” segments. Rush, the supposed Bigot, has had Bo Snerdly, (his show biz name), as his Producer for twenty years. Bo is more African American than Obama could ever dream of being.
Listen to Mark Levin for a week and see if you like him. He has a different take than Rush, being a Constitutional Attorney, but he cracks me up as well.