This question--the best place to live in NH--is going to get you lots of different answers.
I'm sure you'll agree that every family sees appeal and value in different things. Some people want proximity to shopping, some to excellent schools, some to Dr's and hospitals, some to ski areas, some to airports, some to low taxes, some want horses--you get my drift.
Nashua keeps winning the most livable location in the Country, but it's not where I live. It wins because there are affordable homes, access to colleges, medical services, and so on. But it's still a city.
I'll bet you have some topics that might be called your "hot buttons". If you would share them with me, I will give you my opinions. Lots of people who move to the Seacoast of NH want access to Boston (for work or culture) they want good schools, they want affordable homes, they want shopping and maybe lake, bay or ocean access.
Those are usual requests. Anther request I have had lately is 1-2 acres abutting town or conservation lands, so there is a feeling of large space without the taxes usually associated with a larger parcel.
Again, if you want to share your needs and wishes, I'll give you some areas that should be appealing.
Regards, DAne Hahn 603-566-5460