An analogy: when I want to meet new people I usually go to parties that my friends are having because I figure that if my friends like the guests then chances are I will too. However, every now and then I go to completely random bars and gatherings because I want to be exposed to a completely new circle of people who have no common relationships with me or my friends.

Similarly in music, there are times when I want to discover things that are similar to what I have liked in the past, but also times when I want to discover things that are completely random and unrelated to anything I have ever heard or liked.