Internet Radio

I am just starting to explore Pandora Internet Radio. It's free. After you sign up, you choose an artist or song you like and create a station with one click. Then the music starts streaming. It's like radio in that you don't get a choice of what they play, and there are short ads, but where else can you listen to radio where the music is similar to Bear McCreary? This way you hear artists you may not already know.