I was summoned over here by a friend due to my obsession/knowledge of Ulver.
Let me explain a few things, first off about the albums, they are all different. Each album encompasses a different quality, from black metal, to folk, to industrial, to electronica, to rock, to metal, to jazz, to experimental, to ambient, etc. Nearly all of there albums contain multiple elements fused flawlessly together. I'd say a great album to start with is the new one, blood inside. It is pretty straightforward and mixes tons of various aspects of Ulver. Perdition City is another good album; you should probably focus on these two first, and then dabble into the rest of their discography. Not sure if you will dig the black/forest metal Ulver, but I'd recommend giving it a try, don't let the raw production turn you off. Enjoy