I have always been more of a Capcom guy (still played SNK titles like Fatal Fury), but there was a point where I had to face reality.
KOF is da shit!!!
The reason why, is because it is extrematelly DEEP.
It will take a long time to really master the style, cause there are a lot of things to learn.
You have to learn how to use each tool works, againts others and againts yourself.
I can say I pretty much reached my top level, but still, sometimes I learn a little here and there.
Good thing is if you are new to KOF and you like it so far, it only gets better from now on.