Well, I don't really do arcade games, but as for pinball my favorite would probably be Funhouse by Williams.
Right behind me here in my basement/office I have a 1979 Bally Paragon and a 1990 Data East The Simpsons. Actually was seriously considering buying a Data East Laser War tonight, but that fell through.
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder
Favorite Steel: Steel Vengeance, Expedition GeForce, Olympia Looping
Parks visited: 222, Coasters Ridden: Steel: 822, Wood: 178, Total: 1000