The burden(?) of an enormous old-school fansub collection...
ETA: according to deepdiscount.com, similar titles to the complete Princess Tutu anime DVD set are the Jurassic Park Adventure Pack, Battlestar Gallactica Season 2.5, and the Alien Quadrilogy. You know, since rampaging dinosaurs and blasting aliens have soooooo much in common with a mahou shoujo in ballet school. *snort*