I'm in very good health, and I haven't been to a doctor in more than 30 years. I will not buy health care, nor will I pay a penalty. Just because the government assesses a fine, it doesn't mean they'll be able to collect it.
As a freelancer, I don't have employer-supplied health coverage, and I don't really care. I am not paying hundreds of dollars a month for health insurance just because the government thinks I should.
I just have strong opinions about taking care of yourself, and I'm willing to pay the consequences for that point of view. If I get sick, well, I guess they can just scrape me up off the street and put me in with the landfill!