Originally Posted by aeh
Or, as in one family I know, one of the siblings chose not to pursue an area of significant talent because filling that role was too important to the other sibling's self-image to jeopardize with perceived competition.

Yep. It happened in mine, only when I avoided the talent area (music), it found me anyway, as the teacher sort of discovered me by accident. I'm pretty sure the fact that I subsequently participated at the highest levels, just as my brother had, that it had a far more profound negative effect on his self-esteem than anything I earned on my report card.