Milk, a streaming music service that was once only available on Samsung mobile devices, is now available at samsung.com. Just set up an account and give it a try. Be warned, it still looks like it's made for a tiny mobile screen, because it's just about the same as the version that was made for just that. I'm expecting changes and additions soon, however. The back end of the service is kept up by Slacker Radio, a streaming radio service you may have had on your phone since the time you purchased it (if you use Verizon).
You'll see that there are lots of stations to choose from. In fact, there are about 200, including Party Country, Backpack Rap and Slow Jamz. Those are not genres. They're just names that represent the music of a station, which is curated by "music experts", according to Samsung. You can customize those stations by adding songs and adjusting the newness and popularity of the tunes you want to hear. Favoriting artists also alters what you'll hear. You can also create stations, almost exactly like you would do with Pandora. Just name your new station and populate it with songs and artists. Milk will then play similar music on that station.
Personally, I don't get why these apps are still such a big deal. Spotify is where it's at, if you ask me. Then again, I just don't listen to radio much, internet or otherwise. I like to listen to albums. I choose an artist and listen to an album, all the way through. I suppose that's not the most popular style of music listening anymore, but it's why I use Spotify. I can't just do that on my mobile device without paying a monthly fee, but I can do it on my PC any time. If you have used Spotify, you know that it will let you pick any song you want and start rocking out to that particular song, no radio involved (you do get radio with Spotify, and it works like Pandora). Pandora and Milk (Slacker) aren't built for that, but they do have an advantage over Spotify. They'll stream The Beatles and AC/DC!