Psion
Adventurer
Too many players think that everything, and I mean EVERYTHING should be available to them.
"Mage of the Shining Star Desert" PrC? The players wants it, even if his PC misses the critical requirement: Must be born in the Shining Star Desert on a clear and moonless night.
Oh, wait, those kinds of PreRequisites aren't in fashion, so the GM should remove all non-mechanics PreRek's from PrC's and Feats and such.
Now that's what I am talking about. I would so tell the player who said that "too bad. Find another game if you don't like it."
I'm pretty reasonable and try to give the players a lot of options.
But, in 2e, I had a player who wanted to play what he perceived as the best race, but also wanted to play what he perceived as the best kit, which was for humans.
I told him no. Campaign consistency is not to be sacrificed on the altar of twinking.