I think that doing maternal incubation is less stressful on the mother. I think that despite popular belief, females are more likely to eat if you let them keep their eggs, as opposed to pulling the eggs and leaving them with a strong incubation instinct but nothing to incubate.
I can say that while on eggs she's been a much more aggressive feeder, more than she has ever been before. I'm not sure if that feeding habit will stick around after the eggs hatch. Other than that I haven't noticed a temperament change.