Actually, I think I liked the first Star Wars game best...the one where you control the target of the X-wing. So different (visually) from all the other games from that time. I always loved it when the Death Star blew up.
My fav non Star Wars one would probably be Pengo(!)
As far as current stuff, I only like some of the Pinball games, really.
Anybody know of any good arcades with lots of FUNCTIONAL classic boxes?