Re: Dwarves with No Spirits
If I'm not mistaken, historically speaking, your soul is what makes you you. It's what carries all your psychology (so connecting it to EGO is right on target). The spirit is what makes your body live (so tying it to END is pretty appropriate as well). It's not really intelligent, but can form habits. When a person dies, their soul goes on their final reward/punishment, but it's possible their spirit could still roam the earth as a ghost. This also explains ghosts of (dogmatically soulless) animals. Somewhere along the line, this metaphysical hairsplitting disappeared.
It seems to me that, aside from being full sociopaths, elves, gnomes, and other soulless beings wouldn't have psychological limitations, having no real psychology to limit. If they have anything resembling a psych lim, it's a learned behavior more than a true obsession/phobia, and should be easily bought off when they learn other behavior. For example, if a soulless critter has a "fear" of fire, it's because it learned that fire is dangerous, but as they learn the proper handling of fire, the fear should fall away quickly.
There used to be an RPG called Arrowstorm or something, that made some kind of soul/spirit connection to corporeal/non-corporeal undead, but I don't recall exactly how anymore...