I play WoW (no surprise there).
I mostly play a mage. I often find myself in real-world scenarios wishing I could turn people into sheep or teleport myself somewhere. I don't generally find myself wishing I could cast harmful spells on folks in the real world, but I do wish I could cast beneficial spells (buffs) on people, especially intelligence buffs. One of my favorite things I wish I could do is create an aura of clarity that might help people around me avoid stupid mistakes.
What sin has not been committed in the name of efficiency?