Jacob's Ladder- Loved that one, although I haven't seen it in awhile. Hmmm, I don't have that one on DVD yet...
Mulholland Drive- Bit fan of Naomi Watts topless, but I thought the movie was low rent & manipulative. Overly clever at the expense of intelligence.
Sixth Sense- Liked this one a lot, too. I though Willis was good, Haley was amazing, very good story. For the record, I didn't realize "the twist" til 15 minutes from the end. I will say, though, that I felt
Unbreakable was much better.
Of films in the same general style (ie confusing!

) I highly recommend
Donnie Darko. Definately very cool, and really twisted. I also liked
Eye of the Beholder," with Ashely Judd & Ewen McGreggor.