Few questions for someone:Welcome!
4X2 vs. 4X4 has many different opinions. From the cost difference to do you really need it, to gas mileage difference etc. Then there is the better to have it and not need it, than to need it and not have it.
I believe the majority here are not first time Nissan or Frontier buyers. I personally am on my fourth Frontier and have nothing negative to say about them. Other than a minor thing here or there, my vehicles rarely need to see the service department for repairs.
With the V6, I have had as high as 24.4 mpg on an all highway trip. Read through the posts, I feel most are happy with their purchase. There are also others who wouldn't be happy with anything they own. Some look so long and hard to find things wrong I don't even bother to respond to the posts. I've owned many different brands and am most happy with Nissan.