Piratecat said:I'm of the opinion that if a player really wants to use a particular concept, then it's usually worth the DM trying to allow it if it fits into the world...<snip>
I generally agree with this approach, when someone wants to play something that is within the milieu of the fantasy game, but how would you feel if someone in your traditional D&D game wanted to play a d20 modern gunbunny, or a bizarre mutated super ala Trinity...it might give you pause, rightly so...to me psionics is just as out of place in fantasy as a blaster-rifle wielding storm-trooper would be...Barrier Peaks not withstanding

On top of that, there are the other players' opinions to consider. Do I force them to play in a world with psionics just becuse one person wants to try out the new book?
All that being said, see my earlier post regarding what we decided to do...