Thank you, everyone for your insight!
I am playing and GMing in the 5th Edition, but your guidance and insights have given me a better foundation on which to build my character.
He is a Telekinetic to which I wanted to add an inherent weakness in the use of his powers -- use of his powers taxes his mind, stunning him or knocking him unconscious with too much use. It will give his campaigns more dimension and force me to think outside of the box. In time, hopefully, he will earn enough experience points to eventually buy out the weakness as he further develops as a hero.
Thanks, again! You all ROCK!!!