I would really like to see support for regular expressions in the filter for artists. It would be great to filter out artists according to more exact premises. The main reason is that I have a lot of loud music with growling and some classical stuff, and sometimes I want to add all my metal to a playlist and exclude the classical ones. To add the artists manually is just to much work ( ok so I am lazy ) when you have a lot of music. If implementing a regular expression library is too hard, maybe you can implement a negative filter? Thanks for an otherwise great product.