In my workshop I have Hi-Score Pool and Shadow and have been playing the heck out of both of them lately. Hi-Score Pool might be the simplest pinball machine, yet it is incredibly fun and a shooter's game for sure. Best played with two players for the stealing of racks and bonuses. Excellent drinking game.
Contrast that with Shadow, a top 25 game with ramps, diverters, modes, 3rd flipper, DMD, deep rules, etc...
What are the two opposite, end of the spectrum pins, that you currently own? Sadly Hi-Score is being traded this weekend, but I highly recommend trying one out if you have the chance.