Using c-stick for aerials is just smart. It just allows so much better spacing and control while doing aerials.
I've been a long time player without using most advanced techniques. I've used short-hops, l-cancels, and directional influence naturally- but some things aren't so intuitive, such as wavedashing, wavelanding, waveshielding, ledgedashing, missle cancels, and the like.
I've done VERY well without them- but I can't ignore their usefulness. After practicing alot to get the moves themselves down, I've just got to learn how to work them smoothly into how I play. I find that this part of learning advanced techniques is most of the work.