Quoted from paulace:

I do that all the time in our league - I'm an average player, and don't stand a chance against the really good players on a modern Stern - I'm never going to learn those complicated rule sets. When somebody starts explaining the modes to me, my eyes glaze over....I just try to stay alive and hit the blinky lights.
So when I get to pick, it's EM time! I feel that it evens the playfield a bit - the rules are simple (hell, they're usually printed on the playfield), so it's just a matter of making the shots, and everybody gets the occasional house-ball, no matter how good they are. My chances of winning on an EM are much greater. Luckily, even the good players in our league like the EM's, so we all have a good time. We've had some epic battles and final ball comebacks on Fast Draw and Royal Flush.