As someone married to a JW and who is friends with several others, I will say this: like any group of people, they can be a mixed bag. Some are more closeted and “in the truth” whereas others are more outgoing and “worldly”.
One the things that I actually admire about them (the individuals, mind you, not the Watchtower organization) is that they really seem to try and live by the teachings of the Bible and study it frequently. Much more so than, say, your average evangelical Protestant.