Black Metal.

The flamenco part is the only appearance it makes, but trust me, it is a very good album. There are many other characteristics to catch your ear. A "busy" album, rarely is there a dull moment.
What kind of black metal is Armada? Minimalistic, etc.?
 
but plenty of Varg himself is.

That's not entirely true either. Varg is very far from being a socialist. He used to call himself a national socialist or nazi, but later realized that was by no means the best term for his views (and it isn't). He is surely a nationalist and racialist (note: not racist), but without the socialist you can't really be a national socialist. If he made music that reflected his socio-political views directly it would be nationalist black metal, not NSBM.
 
How so? The first three all sound like Black Metal to these ears. Okay, Third one's iffy, but I still count it.
The riffing technique isn't black metal. I do like all of their material, it's just that I don't consider all of it black metal. Some of it really have a lot more in common with death metal than black metal, at least to my ears.
 
I just gave Wanderings by I Shalt Become a listen; good Burzumesque stuff without being another Varg wannabe. Reminds me of Fullmoon too in a way.
 
I try and try but I can never really get into Emperor. I don't dislike them, but at this point in time I do not really love them either. They are a good listen every once in a while, but far from my favorite. That being said, the "Emperor" ep/split is my favorite thing they have done atm.