I saw them when I was a kid & they were just coming into service in the late 80's & thought "cool trucks". Then when I got into offloading about 12 years ago I thought I want a hmmwv if they become available to the public at a (somewhat) reasonable price & I finally got 1 last spring.
The reality is they are old school bare bones trucks with no creature comforts, but if you are seriously thinking about getting 1 you already know that & don't care.
If you want to go down the highway at 65+mph have good heat/ ac, it to be quiet, to stay dry & get decent fuel mileage you'll look/ get a modern civilian use built vehicle.
In a hmmwv you'll draw more attention going down the highway at 55mph than the red sports car doing 90+mph & you'll probably piss off just as many people. It will be a good conversation piece some will be good & some will be bad. You will not be able to do anything stealthy, everybody will see you when you go someplace.
For me its a cool truck that I love, but I've got a fleet, I've got 3 goldwings that are my commuter econo use all the time vehicles, when I need something bigger I have a ram pickup (my primary tow vehicle, but also all around comfort), a lifted wrangler (my primary offloaded) & the hmmwv (as my primary 4 wheeled runaround vehicle)