Levin takes liberals so he can insult them.
Rush takes callers that allow him to make a cogent argument for his position on any given issue.
Rush rarely takes calls that merely feed his ego and he rarely if ever insults a caller no matter how base the lib's argument.
Hannity also takes women who will flirt with him. Just annoying IMO.
Savage really likes it if you call him Dr. Savage and tell him how brilliant he is.