These kind of threads always devolve into people posting their personal preferences, which I don't think is too helpful.
One guy says "I hate Twilight Zone", the other guy says "Twilight Zone is the best game ever." How does that help anyone?
To be useful, a list like this should include the most popular collector pins.
Because instead of representing ONE data point (you), it would represent the entire mass of collectors.
If you picked games that were extremely popular among all collectors, then the statistical probability of a person enjoying the collection would be highest.
Since the OP is a different person from you, the odds of him enjoying the exact same 12 games as you are very slim.
But the odds of him enjoying 12 games that are broadly popular is high.
Same thing with arcade games.
If you wanted the highest probability of a single person enjoying your collection the most, then you would pick games that were very popular across the population, like Ms Pac Man, Centipede, Star Wars, etc.
Since those games are MOST popular, it proves that they have the qualities that are enjoyed by the MOST people. So the probability of the game being liked by a single random person goes up. It's statistics.
Actually, now that I think of it, the idea works for everything.
If you were spinning records like a DJ, the chances of the MOST customers enjoying your record picks would go up if you picked the most popular songs.
If you picked records that were less popular, but better liked by YOU personally, the number of happy customers would statistically go down.
So the question should be rephrased, "What are the most popular pinball machines among pinball fans?"