We will improve the ability to edit the location, Especially for users who are signed up and just want to check out other areas, without changing their account settings.

And as far as the sizing, it is based on overall popularity when you are not logged in. When you sign up and add favorite artists it begins to personalize itself to your taste in music.

Hopefully this makes the site useful to everyone, but VERY VERY useful once you signup and begin to add your favorite artists.