For me, it's definitely been my AC/DC Premium. I haven't had tons of time to just play pinball lately at home, and AC/DC has been perfect for those 15-20 minute moments when I can only get a couple of games in. The way that the game is so wild I can get sent away with a handful of 10 million point games or I can throw down a 70 million or better nice game. The fact that I'm so inconsistent on the scoring really keeps me addicted.
I don't know how long it will stay top on my playlist, for now AC/DC is king.