Well some of the ACA is pure price control, which any one in favor of liberty should be against. Forcing insurers to charge the same for women, for instance, is fucking ludicrous as women require loads more healthcare on average than men do. And obviously people with pre-existing conditions should have to pay more for insurance in accordance with the increased risk they impose. Nothing wrong with having laws that keep insurers from defrauding people, but many of the provisions of the ACA are a bridge too far.