I'm 56 - so mostly 70s EMs in my lineup... mostly Gottliebs, but I like some of the Williams and Bally games from the mid to late 70s just the same. I have a few SS games - KISS, Whirlwind, FATHOM but my heart is with EMs...
Starting to get into some really old EMs from the 40s and 50s too... there are some wonderful players in that era, just give them a chance. Like all games though, they have to be playing top notch to get a true feel for how great these games can be.
Don O