Have owned them all. Here are my thoughts;

Creature is a rare combination of great theme and great game. People who like Mode based games tend to dislike it, because it plays more like a system11. I happen to like the building objective of achieving multiball, and then trying to qualify the jackpot and superjackpot while building the multiplier. It's very difficult to do. Somewhat expensive, though.

Demoman, I didn't care for. It looks great, but there's a lot of cool looking ramps and stuff, but a lot of times that a ramp shot ends in a wait. I can't remember everything, but I wrote a review about it in the reviews here that spell out my issues with it.

The Shadow takes itself too seriously. It's really fun for a bit, and the ramp lane changers are cool and it's fun to combo and orbit. But for some reason, I had enough after a very short while. The ball-lock is cool. I traded it for Creature.

Judge Dredd is the only game I've bought twice. Lots of combo shots, and a funny theme. There are a ton of modes, but they all feel different. The Dead World is really cool too. Lots of humor and great artwork. For the money ($1400, folks!), it's the keeper in the bunch.