I can see some pro's, but they aren't exclusive to witnesses. Sure, I can speak in public. I can adapt to my audience. I can read aloud REALLY well...but my morals and values were from my parents. They were real. I saw other families in the congregation with totally different experiences.
My biggest negative was feeling 'different' from 'the world'. I didn't fit in, and still don't... Not even after 25 years.