I love EM's because in my experience
a) they are much more challenging to play .. you must think about your game play a lot more
b) they are easier to fix when they break down and they are more reliable 
c) the artwork
d) the history
e) the noise they make (love those chimes)
f) the score reels
g) the smell
b to g in no particular order
Love the noise, Love working on them, Love the artwork but don't particularly like the smell.
