What events from your childhood do you feel you need to shield your own children from? Are there ways that this has led to excessive control?

I feel that the issue of bullying was not in the spotlight when I was growing up and parents (at least mine) didn't see it as a cause of concern. Emphasis on studies was much more important and everything else should be put aside. As a result, I feel that I grew up self conscious, wary and suspicious of pretty much anyone that came into my life. Opening up my heart was as equally hard. But I'm better now but looking back to my childhood makes me determined not to let that repeat for my kids. I don't intend to shield my kids too much from things because experience is the best teacher but if the experience is causing them pain or discomfort, I want them to be able to come to me and tell me. I'll try my best to make things better for them.