Of all the EMs I got to play at Expo, two had me keep pushing the start button (of course after making sure no one was behind me waiting to play ).
Abra Ca Dabra - I know alot of people like this pin, but the first few times I played it, I didn't care for it much. I must have put 30 games on it over 3 days and I really like it now. A guy I bought a Centaur from a few months ago has one and I'm going to go pick it up this weekend.
Spin Out - Not sure why I like this one so much. Maybe it's the roto. It's plain and simple, but I just couldn't get enough of it.