It's hard to specifically lay anything specifically at the feet of the WTS, because many people have similar experiences, and are nurtured in the same way.
I learnt a lot at school, that was coloured by the JW experience, and the interest it drew through periods when I didn't want drawing to anyone's attention made things a little difficult. Probably little more than the Hindu or Quaker boys, though. At least I was open enough about my religion that I found out SOMETHING about their beliefs.
By virtue of my parents having been raised as JWs I was taught to read really early and there's no doubt that opened up whole worlds to me (they didn't stop me reading Greek Mythology strangely enough). I also got an incredible knowledge of the minutia of historic Israel and the ability to yell at the TV Quizes when people miss the easiest of bible questions.
Probably the "Theocritical Monastry Skull" had the biggest impact on me. I enjoyed giving talks, so it augmented the encouragment of self-expression I got at school. This came up when I was asked to read a part in a book, during English Literature classes. I got great grades in that, especially for interpretive expression (perhaps learnt in part due to my detesting hearing the bible read in a monotone). I got a good idea of certain people-skills (good and bad) just by watching the way the various Conductors would offer counsel. Taking it as the Conductor, later in life, consolidated those lessons.
But these are mainly life-lessons that I've expressed. What about character traits? How do you tease those out of your experience? Aren't they part genetic, part nurture? How much of it can you attribute to a particular religious upbringing or to the way the various generations of your family have raised the successive generations?
I guess human beings are walking contradictions, however they are raised.