What do you want in a radio siote?

I am considering re-opening my old online radio site, LightFM. I've still got the domain, which I am current in the process of changing the DNS for. But before I go straight to designing and developing it, I want to know what YOU want it to be like.

I want it to be perfect for its target market, which is teenagers and older children. This is why I am asking here, as most of the people on the forum fall into that catagory.

What sort of colours would you like it to be? I would have said light, but bright colours to go with the name. What features would you like to have? What would you want the overall layout to be like? Do you care about features like "Rate the Song" and "Rate the DJ"? Also, other comments are welcome :)