Psion
Adventurer
Let me add to my "less cool" list:
Gith: The way that our old GM introduced them was way cool, and Planescape carried the torch.
But Gith in 3e have been a mess. They can't decide which favored classes they are supposed to have, they make Githzerai lawful, and they introduce a whole Githyanki campaign arc which, while otherwise cool, has one fatal flaw: it made them non-Psionic.
Gith: The way that our old GM introduced them was way cool, and Planescape carried the torch.
But Gith in 3e have been a mess. They can't decide which favored classes they are supposed to have, they make Githzerai lawful, and they introduce a whole Githyanki campaign arc which, while otherwise cool, has one fatal flaw: it made them non-Psionic.