Depends on what you’re looking for. NH has everything (like every state let’s be honest). If you want small town city vibes then Dover and Portsmouth are great (but pricey). Manchester, nashua, and concord are the big cities that have their positives and negatives (if you want to be as close to Boston as possible I’d go with somewhere around here in the southern NH region). Or you can go to central NH around lake winnipesaukee (Laconia, Meredith, Gilford etc) that are beautiful small lake towns but also pricey. Much closer to the mountains though which would be great if you like hiking and natural beauty. NH has something for everyone and it’s all pretty close to each other!