I think a person's experience as a Witness usually gives them an unique insight. Typically the average Ex-JW has experienced multiple sides of life, being in a form of fundamentalism and seeing the worst side of religion, then usually rejecting religion altogether and appreciating the value of critical thought. When going to college, I found that many were just going through the motions to get their degree. Because of my background, I appreciated the chance to develop critical thinking skills.
I've also found that when holding a strong opinion - typically in a political debate - that some of my non-JW relatives have used my JW background against me, targeting a strong opinion they disagree with on 'that type of thinking you learned as a witness.' It really is a cheap shot, and an ad hominem attack. Instead of addressing the argument, some resort to attacking the background of the person.
In the end, I would say that my background has strenghtened my perspective, but also showed me the dangers of 'certainty'. There really is no final solution (and shouldn't be). We're all just figuring it out as we go along.