Whenever I play against most things in 3S, I feel like I'm up against the other player. We're thinking about things and trying to figure out what the other guy is going to do, it's pretty neat. When I'm up against Chun, it feels like I'm playing against the character.
"What is my answer to back fierce?"
"Oh she has enough meter, I better start blocking down always."
"I just got thrown four times because I was afraid of her ridiculous normals."
I don't know that I've ever played a really good Yun in AE so I have no comparison though.