Pandora vs Slacker

Both Pandora and Slacker are well thought out Internet radio services but beyond that their are some big differences. \n\nThe big difference is what each service excels at.\n\nIf you like pinpoint control over the artists in your stations then Pandora is for you. Slacker is better for lazy folks like me who want wide choice of channels that are pre programed.\n\nBoth are excellent choices and both are free with paid versions for some extras.\n\nWhat are your thoughts?