I am the ancap type, that populates your feed. (unsurprisingly)
Still, the definitions and most talking points are the same as with minarchists and other libertarians, or tbp classical liberals.
The only meaningful difference is whether we believe. that the state can do something, that the free market cannot or whether it can do something better.
Me trying to find that thing that we need a state for is what made me an anarchist, because I couldn't find one.
You may have seen some zealous fresh ancaps, which feel the urge to force feed everybody their freshly found truth. Every single movement has that kind of people (unless it's dead) and in every movement they are very annoying and mostly wrong. Could that be the case?