Game play wise Barracora is possibly my favorite from the time. Adding the new ROMs for updated scoring that are floating around does help. Paragon, EBD, Fathom and Centaur are also really good. Don't forget Stern used the same boards as Bally basically. Meteor, Nine Ball, etc. Gottlieb Alien Star is similar to some of the Williams/Bally at the time and a fantastic shooter. Devil's Dare is a really under rated Gottlieb wide body from way back when.