YESSS... see my KISS resto thread    

Kiss was THE pin that got me hooked on pinnies. Since i started buying pins in the late 80s, it became my holy grail for that reason  
And what makes it even sweeter, is the fact that THIS VERY SAME machine is one of two Kiss machines i played years ago (mine the 2nd one).. and i now know the whereabouts of that FISRT Kiss machine too that i played all those yrs ago too  

For me, a "holy grail" pin is one that has had a big impact on me, one that blew me away when first played (there are several that fit that category). So Kiss, being the first machine i'd ever played, was my first holy grail, and Haunted House was the other game that blew me away when i played it, so if its possible to have more than one holy grail machine, that one would be number two