Everyone has that one friend that can tell you bands you'd like once they hear which ones you already dig. If you don't, Gnoosic fills the void. The service asks for three bands you like and returns one artist recommendation.
Gnoosic is about as simple as music recommendations can get. There's no activity tracking, no generated playlists. Just enter three artists you like and get one back. You can say you like it, dislike, or skip it to get a new recommendation based on the same input. If you decide the recommendations aren't working, just reload the site and start over. It's perfect for people who don't like having their music habits analysed or broadcast, or just hate feature bloat.