Collectors probably dislike the progressive jackpots on many of the System 11 pins, but I would imagine they did a good job of getting people to play the pins and earn money, which is what they were intended to do back in the day. Walking past that pin with the flashing maxed out jackpot just begs you to play it!
When I had my Taxi I set the minimum jackpot amount to 1 million. Getting multiple jackpots in a game sucked when the second one was worth half of the million shot and tougher to get.
But I digress, my favorites are Whirlwind, Taxi, Diner, and Pin-bot.