I am one of these. I've been called a survivalist, a prepper, a doomer. Heck, I've also been called weird, a pessimist, and once, I was even caled a freak. This of course, happened when I was forced to explain why I was survival camping in a desert "for fun". Please note, I do not beleive that TEOTWAWKI is tomorrow, I just enjoy the training, the confidence it gives me, and the "bases covered" feeling I get when I know that I can care for my family through almost anything.
Anyway, I originally got into raising chickens (and goats and gardening, etc) as a prep. Basically, my goal was to turn my property into a self-sustainable hobby farm, not to be confused with a self-sustaining "real farm", in case I ever needed it. Once I got into it, and found how much I enjoy hobby farming, it became less about preparation and more about fun and work with a solid, visible result.
Now I still enjoy family survival camping, teaching my fiance defense techniques and marksmanship, and generally challenging myself to come up with ways to provide a good life for my family in adverse conditions. I still run fire drills for my kids, and teach them to respect nature and how to camp without being seen or heard. And I still get the rare chance to bug out on my own for a night or two with nothing but what I carry on my back. But now, I have learned new wholesome skills to teach the kids, and while they don't enjoy farm chores as much as camping, they really love the new "pets" that they are not allowed to name and the fresh eggs and veggies.