Corporate personhood is the root of a lot of evil in our country. I think if corporations want to be people, they need to be properly accountable to our justice system, including the death penalty. They should have to serve jury duty, they should not be allowed to be dual citizens, etc.
Right now corporations are getting mostly the good stuff when it comes to being a person, and the few things they have to suffer with (taxes and some pesky laws), they do their best at bribing politicians to fix. Oh, I mean, donating, not bribing.