I really like the MPC, there is one big flaw though (or I just don't know how to do it right): You can only add files to the playlist with drag&drop. This is very inconvenient as you need to open the explorer, go to the right directory and then drag the files over. I'd like to see a "add file to playlist" when right-clicking the playlist.

Or am I just too stupid and there is another way than drag&drop?