I’ve travelled a long road from the evangelical warmongering patriotism of my childhood, through teen-aged objectivism turned liberalism (it was mind-bending for me as well), radical environmentalism, socialism, marxism, and then several flavors of anarchism. At some point I decided to throw everything out and start over from scratch.
To summarize, I believe in reality as it can be demonstrated to exist. I work from the assumption that I exist. I further assume that my senses convey to me a reasonably accurate reflection of a objective reality. The basic tenets of logic encode basic principles of the physical world and allow us to use our reason to determine the validity of truth claims.
Besides that, I try to keep an open mind.