A few of us including myself are actually ex-anarcho-capitalists, now choosing to go by labels like anarchist-without-adjectives and left-libertarian.

Anarcho-capitalism, in a broad sense, is about removing government and allowing market means to provide services like police and justice, instead of having them monopolized by the State. Some an-caps are rather conservative, and they typically defend private property like anything, and act like left-anarchists are stupid or whatever. I find that broad anarcho-capitalism and traditional left-anarchism are quite compatible.

Normally I don't recommend Lew Rockwell, but this is a good article - Libertarian Anarchism: Responses to Ten Objections".

If you have any further questions, feel free to ask!

I'm sort of a post-ancap or ex-ancap so some of that doesn't apply to me.

I don't think only businesses should handle things, I would imagine voluntary worker cooperatives would also have a share in the market. But to address your objection about organizations handling things, most anarchists do not support Wal-Mart including me. In an anarchist society, organizations would take care of services and goods, with competition in the market. You don't like business or cooperative A, don't buy from them.
But under government, you impeach a president and you get replaced with a new ruler.

You say you believe in government control, why is that necessary at all?

So you believe governments should be voluntary? Like voluntary police and courts and such? If they're voluntary, what would prevent new ones from competing against them, which would destroy the centralized power system?

Arguing that monopolies (which you imply are bad) will arise, contradicts your belief in a monopoly of power and certain services (the State). You're basically arguing that we need a monopoly of power to prevent new ones from arising.

I'm moving this to the politics forum. Fits better there.