Im a Sub-Zero player, I use Ice Clones quite a bit, but its more for strategy just beacuse I use it to trick my oppenent for various reasons.
On to the topic at hand,
I find Ermac really annoying because everyone knows the same combos with him, nothing new.
Scorpion just pisses me off, Hellfire, XXX combo (Square 3 times for PS3) teleport, and spear. Always for the noobs although I do come across spme skilled Scorpions such as my friend, its not often I found one of those though.
Smoke is not different at all, different user, same ********. They throw the smoke cloud and teleport and MAYBE now one 20-30% combo. Thats all a Smoke player can do.
Kitana is the one I hate MOST by a longshot. Every user just spams the fans over and over and over. For me its hard because I main Sub and he cant teleport so I find her fans almost unblockable because I cant get close without getting hit.
But most of the others like Kano, and Kung Lao and Liu Kang dont bother me. I can easily beat a Kung Lao, Kanos usually suck, and Liu Kangs are onyl annoying when the spam the same pop up combo.