Has anyone tried running an entirely Psionic campaign? IE, where all the characters are different varieties of Psion or Psionic Warrior? Seems to me that the different kinds of Psion can replace most of the standard party positions - the Nomad for the Rogue, the Egoist for the Monk, the Shaper for the Sorcerer, etc.
Does this work? Or am I howling at the wrong astral construct?