90s will always be the best imo. Those pins have original themes, lots of humor, wonderful dmd animations, a ruleset that can be understood even by beginners and unique toys/mechs that define each game apart from the others. They hit the sweetspot between fun and challenging.
Today's modern games that Stern and others are churning out feels like the same game over and over, just with different art and a million flashing lights. It doesn't help that the themes are always boring movie/comic licences with zero originality. Lastly, the rulesets have become so deep and complicated that the average player will se about 10% of them and don't understand what to do. Don't get me started on the lcd screen that plays long movie clips that the player can't look at while playing. If I want to watch a movie I won't play a pinball.