Sub-Zero mirror is so boring. It's defensive turtling
Oh, and CSZ mirrors are so annoying. Too many same freeze times. Ice bomb and ice ball trades are very random and lulzy. And the worst part? Constant parrys to each other. I mean, who expects to get parried by themselves?
Noob mirror and Ermac Mirror are also boring to watch and play. Noob mirror ends up being a clone and teleport spamfest, while Ermac's is just plain old boring.