Haven't studied it much at all really but I always thought the diverse coalition of anti-fascists on the Republican side was interesting.
It's simple. If there's any authoritarianism then it's not libertarianism/anarchism. If everything is voluntary, then it's just libertarianism/anarchism. There is no need to distinguish "left" or "right" libertarianism/anarchism, people are free to voluntarily do whatever the fuck they want in either.
Unless it fits in to the established paradigm most of these concepts are simply too slippery for most minds to grasp. There are many pictures in the AnCap/Libertarian circle jerk thread you would probably enjoy.