I like Roon Radio better than Pandora. I find it digs wider and deeper bringing up tracks buried in my large library that I'd never have thought of, but it's almost always inspiring and non-repetitive.
Sometimes I forget to close Roon at night and the following day, I browse the queue at what played, just to check out what it suggested. Better playlists than most social suggestions, lol.
Cheers,
Spencer