Matt,
Believe it or not, yes I do spend much time entering data in fields. Part of the problem is I am encoding my rather large music library which is 60% classical, 30% jazz and about 10% rock & misc. The CDDB database (and YADB, for that matter) are fairly brain-dead. For instance, if I am encoding Brahms Piano Sonata's performed by Yo-Yo Ma and Emanual Ax. Guess who the artist is? CDDB brings back Johannes Brahms! Last time I checked he's been pushing daisies for 105 years. The artist(s) are Ax and Ma, of course.
I am also strick on how artists are entered. If, for instance, the music is symphonic, I enter 'conductor, orchestra' in the artist field (e.g.--Karajan, Berlin). If the music is a concerto, I enter the soloist ahead of the conductor ahead of the orchestra (e.g.--Mutter, Karajan, Berlin).
Which is how I listen to my collection. I may want to hear Horowitz' performance of Rachmaninov's Piano Concerto No. 3 ('Rocky III' to those of us who really like this composer) with Ormandy and New York. And, I have as many as five or six recordings of this particular major classical piece by different artists, orchestras, conductors, etc. Each proformance provides a unique perspective on a great work.
CDDC rarely gets the information right. When one has a few thousand CD's in a large, comprehensive library, the work-load for to produce a clean database is large. Bottomline, I have been doing serious data entry all summer since I discovered your very fine software and had enough confidence that I could build such a comprehensive music library.
The fields most useful to auto-complete are 'genre' and 'artist' as I use them differently from the CDDB universe. An example of my genre's for classical music are: Piano Solo, Piano concerto, Piano Trio, Piano Quintet, Violin Solo, Violin Concerto, String Quartet, String Quintet, etc. etc. I do the same with other genre of music (with rock, I just let CDDB fill in the genre). Then using your wonderful program, I can look up 'Beethoven' - 'String Quartets' and even further filter by performer (e.g.--'Emerson Quartet)'. This is a huge boon to music lovers where in the past, just keep all of my CD's in any kind of rational order proved impossible.
-Leo