The vast majority of the ones out in supplements and by fans don't add anything new to the game other than some thoughtless groupings of abilities and feats coupled to a lame name. If they use "shadow$SOMETHING" one more time because "shadows sound cool" I'm going to puke. For well over 80% of the PrCs, the same effects could be had by slightly modifying a base class. And of course, all of the PrCs are somehow "elite."

At least there's nothing quite as lame as the term "Storm Knight" (they aren't Knights) seen in TORG.