http://musicovery.com/
In case you have not known it, try this music station.
You select a basic channel by mood, in two dimensions: calm-energetic, and gloomy-positive. On first loading it may take some time for all channels, represented by bricks, to play, but after 20 seconds or so they are all in.
Next you click one such channel, and a new window opens, where you can include or exclude musical styles, and the era from which tracks will be choosen.
Playing tracks can be skipped. Favourites list can be collected.
Especially the calm-positive channels I liked very much.