Besides the new filters, I'd say my favorite feature was the ability to separate certain fields such as composer, artist, or genre by a semicolon so that they appear in every particular field. I'd just like to have this feature for more fields, such as lyricist, publisher, etc. (Maybe the ability to choose which you want filtered?)
Also, although it hasn't particularly bothered me, I think it would be marvelous to be able to choose your own separators. I believe forward slashes would better suit my preferences.
Of course, I'd be more than able to wait till MM4 for these features, as MM3 satisfies everything else I need in a music sorting program.
