Hi everyone, we're back for an update now that this idea has reached 1,000 users. At this time we still don't have plans to let users reset their taste profile histories. You are welcome to create a new account with a new email address at any time (no need to contact customer support). However, this isn't recommended as you're truly starting from zero and it takes some time for us to learn your taste profile.
We're also working on better ways that you can give us direct feedback on features such as Discover Weekly so we can learn more about your tastes.
This idea is still open for votes and comments and we'll revisit this if it continues to grow. Thanks!