I liked the Nightmare Before Christmas too! I loved its theme of combining the two most popular holidays, Christmas and Halloween. First there was The Grinch Stole Christmas, but that didn't go far enough, hehe. The Nightmare Before Christmas was awesome.
Not to mention, I saw a biography show on Tim Burton, of how he was really struggling for a long time, as no one would recognize/appreciate his artwork, so this context added more to the movie for me as well, and I do/did really enjoy Tim burton's artwork in the movie as they fitted perfectly together, hehe
(I love his artwork, and now more and more people are too, I'm really glad of this, as his artwork deserves it, and it wasn't getting its respect in the past, when it should have, but now it finally is, yay!)
The music was of course good too, and it's used in many amvs hehe, such as with Claymore, my favorite manga, hehe, it's done really well:
http://www.youtube.com/watch?v=v0ZVU3cQE0s&feature=related
.