Use Free software goes beyond escaping from malicious programs, having a fast, secure, stable system (even pretty) which you can control to your whim and desire.
Use Free software is to feel between your hands, palpable and predictable, that basic need called Freedom to which every human being aspires and that many due to ignorance, or simply because they do not understand it, can never have.
That's why i use Free software, to have my piece of Freedom, how I want and when I want.