I liked how at the end Culber was shaken by the whole "being a host to another consciousness" experience and needed a minute to process it. Every time someone goes through a life-changing thing in Star Trek they're right as rain by the end of the episode. Like when Sisko hosted Joran Dax (the murder-ey one) he kept the feelings buried inside. I don't think it's a coincidence that some time later he poisoned the atmosphere of Solosos III because of something Eddington said about him on the internet.