Just google WarZ, that will be enough for you..
Dayz, where to start.. In it's purest from, without all the base building is the quintessential survival game..
Who to trust, where to go, is that movement, do I crawl, walk run or just hide. Do I chance the opportunity to go into a town to see if there is water or food available so that I don't starve. If I don't go then I will possibly starve or wait until the next opportunity.
The exploration factor is fantastic, which cannot be replicated on any other game that I am aware of, the use of compass, map, the sun, time of day, map or gps is a necessary and adds to the sense of accomplishment. The main Dayz map is Chernarus, which is 22Km x 22Km, although you probably can say usable is around 3/4 of that.
When Dayz first appeared, it was a whole new gaming format for most of us because of the above. Adrenalin would be pumping constantly, mostly because you care for your character, you don't want to die as it might have taken you hours to build up enough to survive for days, weeks even.
If you haven't played dayz before, then I would recommend a vanilla server to get the feel of how we felt last year.. Oh, you will love night time in game
We used to have loads of stories from in game within the original Dayz thread which was deleted. But I am sure Reddit has one also, will try and find it for you.