While it is not my favorite video, or even my favorite MJ video, I do agree it was the greatest of all time for many reasons. I agree with what VelvetRope said in regards to how it changed the production of music videos and use of choreography. Also, there is no other video out there that I can think of that is still as well known after all these years as Thriller is.

I've been to numerous halloween parties in clubs where they put on a "Thriller" show with the choreography and dancers dressed like zombies. I don't think any other video out there has had the affect on popular culture that Thriller has had.