I'm from your same generation, you have me beat by a couple years.
Yes, it stays with you. It is very difficult to be open-minded or be able to think independently for yourself being raised in a JW culture.
I guess I was always a bit of a rebel. A friend who left the Organization about 8-9 years ago, tells me how he always admired my ability to think for myself despite what the Org tells us to think. I don't know if that is completely true, but I'm glad that is the way I appeared to him and evidently others. Yet he is now completely free from the Organization and I am not able to say that for now. If you ARE a person who tends to think for himself and you are a JW serving in an appointed position, you are always viewed with suspicion by the dyed in the wool minions.
However, over the years, I found that there were people with very responsible positions, CO's, DO's and even at least one in the Service Department at Bethel, that revealed a bit of ability to think outside the Organizational box. I always wonder, where are they now in their thinking?
Recently had a discussion with a Bethel Overseer who had lots of responsibilities. (He was there when you were.) He has had a lot of bitter experiences with the Organization since he left Bethel, and yet, still he remains a JW. Old habits are indeed hard to break.