Revision 2

_Thwack!_ Mark had a lot of pent up frustration, and it felt good to smash the ball. It hugged the right wall as it headed towards the front. Yep, much better than smashing his fist into a wall. No illusion ability, no influencing, no shapeshifting. Nalokine always started exhibiting their special talents at puberty, and he was close to ten years past that.
His brother Eric tried to get the ball as it bounced back, but Mark blocked his path. Eric shared his no-talent status, as did their sister Nicole. It didn’t seem to bother Eric, though. Nothing bothered him for long.
Eric sighed. "Okay. Your game again." Eric’s curly blonde hair, sparkling blue eyes, and easygoing personality contrasted with his own dark brown hair and eyes and serious demeanor.

Revision 1

_Thwack!_ Mark smashed the ball along the right wall towards the front. He had a lot of pent up frustration. No illusion ability, no influencing, no shapeshifting. Nalokine always started exhibiting their special talents at puberty, and he was close to ten years past that.
His brother Eric tried to get the ball as it bounced back, but Mark blocked his path. Eric shared his no-talent status, as did their sister Nicole. It didn’t seem to bother Eric, though. Nothing bothered him for long.
Eric sighed. "Okay. Your game again." Eric’s curly blonde hair, sparkling blue eyes, and easygoing personality contrasted with his own dark brown hair and eyes and serious demeanor. They were both physically fit, using the university athletic....

Original

_Thwack!_ Mark smashed the ball towards the front; it flew parallel to the right wall of the court, almost kissing it. His shot drew his brother Eric off the "T" in center court toward the right to pick up the return, and Mark claimed the strategic spot for himself. He was stressed out, feeling inadequate, and taking it out on his prankster brother usually helped.

There was only just over a month left until graduation, and it looked like another milestone would pass with no sign of the special mental powers that were his birthright as a Nalokine. Classes could be better, too. He was pretty good with languages, and taking a first year Chinese course this year sounded fun, but he was struggling with it.

[This message has been edited by Kathleen Dalton Woodbury (edited January 22, 2010).]

[This message has been edited by Nagrom (edited January 23, 2010).]

[This message has been edited by Nagrom (edited January 26, 2010).]

[This message has been edited by Nagrom (edited January 26, 2010).]

You've introduced a conflict, the late blooming (or never blooming) status of the siblings, but I don't know why I should care. Also, is there a reason the protagonist thinking about this during tennis?