I was wondering how many of you out there use/don't use the "spells and psionics are different" rule and why or why not. I kind of like the idea of making them different but am unsure what exactly the impact will be on my game. My default campaign setting is Forgotten Realms and a lot of adventuring goes on in the Underdark where there are creatures with psionic abilities (mind flayers) as well as creatures with spell resistance (drow and deep gnomes). Any thoughts would be greatly appreciated.