We are also transplants. I agree with the comments you made.
The good news is that we have found that NH "people' have not changed much in the 20+ years we have been here in the Lakes Region. Still friendly, still willing to stop and gab.
When I go "home" to the Boston area I'm keenly aware of the massive changes "down there".
"I am not a native New Hampsherite" reminds me of a funny story I was told soon after moving to Gilford. It goes about like this:
A young couple moved to NH.. and met a local "native" oldtimer. In conversation the newcomer stated "While I know I'll never be a native New Hampsherite.. at least my children will be"
The reply from the oldtimer was.. " If your cat had kittens in the oven.. you wouldn't call them muffins.. whould you? "

Seems it takes more than just being born here to become a real New Hampsherite.
Enjoy your time here and welcome to the best Forum anywhere..!