What is the best internet radio station you have found that allows you to make a channel?

I am searching for a very user friendly online radio station to listen to that allows my music preferences to create a channel or mix of channels. I have tried Pandora but get frustrated with it everytime I try to use it. The commercials are many and why would I want to listen to samples of songs I have bookmarked instead of the whole song? Maybe I am missing something with them but I don’t care for it so far. I am trying Jango at the moment and seems to be ok… just waiting for the issues to begin though. What radio stations do you like the most and why?