I started on this hobby at the end of July. I now have five machines and at one time I had seven. I don't know how many I'll end up with but I now realize that space and my wife's patience are going to be the limiting factors. The lineup is in my signature but here it is again:
Jurassic Park
Simpsons Pinball Party
Attack from Mars
Data East Star Wars
WWF Royal Rumble (project, not working at the moment)