[eino]

Like some others have said, I've found Deezer's flow (shuffle algorithm) to give the best results. I've been using it for a few years now, so I have no idea how fast it could learn for a newcomer.

They just added a "moods" choice to flow a few days ago: focus, sport, party... I think there are 6 of them. But they added it only to the mobile app and not the webapp which is the one I use the most, so I can't really say how good they are.