You're always going to favor/play the games you are familiar with and what you grew up with. That's why some "Golden Age" guys will always bash on "JAMMA Age" games. They probably never played arcade games that came out after 1985. They were either too old to care or the change in types of games were a turn off. Either way, I can understand why some "Golden Age" guys have never played Street Fighter II or other common post-1985 games.
I guess I'm lucky to have grown up playing games in the early 90s during the last years of arcades (Aladdin's Castle, etc.), but I can also appreciate games that came before my time that my older brothers grew up with in the 80s. Nostalgia is obviously a huge part of loving a game, but it ultimately comes down to games you have honestly tried playing more than once that you have come to enjoy.
DK came out 2 years before I was born, but as a Nintendo fan, I've grown to appreciate/love it and it was my first arcade game and one of my favorites. Though, there are games I don't really like for example. Space Invaders. Yes, a well-known classic. But honestly, for someone like me, it's boring as hell. Yeah, I could try for a high score and there's a challenge there, but seriously, booooring.
To answer the question, I've pretty much tried everything notable at other collector's houses, CAX and if you count playing on MAME.