imagine a breath player being afraid of heights, a light player whose never seen daylight, a heart player whose never been in love, i could go on but wouldn’t it be cool? is it possible for aspect players to be afraid of their aspect in some way?

They could be socially conditioned to stay away from them, or even lack/be oppressed by something regarding said Aspect. Finding your Aspect is finding Balance within it, too much or too little and it may be oppressive.