Loving to act in both Haunts and on the stage I look at haunts as a great chance to study human emotion in it's most primal states many time.
After all knowing how people will react and being able to emulate those reactions when a character needs it is very helpful.
But I agree you will always learn more it seems silly to me to ever think you can not learn more about haunting or acting. I almost feel sorry for those with the additude you described Badger because they have lost the child like wonderment of scaring the poop outta some one!!!!
Besides what better practice than a haunt to sharpen your Improv skills every group is diffrent and the reactions run the spectrum.
By the way Jim I am convinced you sir have the spirit of vaudeville actor. You love to entertain and it shows even into your posts.