It's very easy to like Tim Burton films. But Sleepy Hollow's been my favourite film ever even before I knew it was by Tim Burton. Beetlejuice is really good as well, and it has Winona Ryder as a goth...
Some people criticize because he nearly always casts Johnny Depp as a main character and in his new one, Alice in Wonderland, he plays the Mad Hatter. But they go well together!
9 looks pretty dark and it's been rated 12A/PG-13 so should have some more scariness than his other animations. But since he only produces it it might not have as many of his staples, like spirals and stripe motifs.
Sorry, I've read that back and it sounds quite disjointed.