There's really not much difference between leftists and anarchists.
Both live in a theoretical Fantasy.
There are a lot of differences. For one, you can't lump "anarchists" into one group. There's anarcho-communism/syndicalism, collectivism, various forms of religious sects, etc etc.
Anarcho-capitalism doesn't rely on theft or the initiation of violence. Everyone has a right to property. There is no forced taxation at gunpoint...
Wait, when did I take you off of ignore? Dammit.
Anywhoo, there are a lot of definitions of "leftists", all of which rely on theft and violence - while an-caps, or voluntaryists or Libertarians or whatever rely on voluntary human interaction and free markets.
There's a HUGE difference between the two.
And you can call either "theoretical fantasy" but both exist in the world today. I'd hope you'd lean towards individual liberty, but I know you've supported far-left leaning candidates in the past (Romney - and yes - he's a "leftist") and like to force your views down other people's throats. So really the current system should be a utopia for you.
Unless you're under some crazy delusion that voting for either party changes anything. I dunno, ask God the next time he talks to you. He works in mysterious ways. He let Obama get elected for a reason.