Metallica - One of their best ever. This is a great freaking game. It is a freaking chameleon. Are you in the mood to bash? Bash. Are you in the mood to light lanes and rack up points with good shots? Do that. Do you want the pressure of CIU? Go for it, and don't forget to double it on your way out. So may ways to play it, and just a great package overall.
Aerosmith - It doesn't get the love, but this is my most played game. It is a great relaxing game, and it is fun to play well on it. Not too punishing, and lots of stuff I like in pinball. And yes, I still giggle at balls being shot into the toybox. Just a fun little gimmick. If you ignored this game, play it again with an open mind. Fun times.
Star Trek - Smooth and calculating. This game shoots well, and is enjoyable. It really draws you in to the theme. Caveat... I have the movie soundtrack on mine combined with the original games Vengeance music. It's a great combination, and integrates the theme a bit better than the Stern music on it.
Mustang - Again proving I judge games with an open mind... Mustang is a blast. Does the game have technical defects? Maybe, but really it is a shootout of a game. That wide flipper gap keeps you on your toes, and control is tougher like that. You have to move the ball, and multiballs tend to go quickly. With a different theme, the game would be a winner.
Jurassic Park - I've only got about 5 games on it, so I'm putting it in my 5th slot. This game is pretty damn good. The shots are new and interesting. That is the secret to a good game. It is the reason you want to go deeper into the rules. For what is there so far, this game is going to be a winner. I'm impressed with Keith's second game. I found it more fun than the others in the list.