I had the ollld black covered with yellow trim "How to paint citadel miniatures" book before I started Warhammer, which got me into it. The undead in that book captivated me!
I then picked up the 6E starter and the Empire, O&G, and VC army books... and read them while a couple years went by. So I looked at them from a thematic sense, with minimal gaming knowledge of Warhammer fantasy. Granted, in that time, I did play Warhammer Ancients and English Civil War.
While my first army was Empire, VC was my second. I converted them, inspired by an army depicted in the book, to be undead Empire. I absolutely loved it. I even had a little bit of humor in it (skeletons wearing water barrels). The VC book, of the first three I bought, was the coolest. It had wonderful art, it had cool fluff, the hobby part was the most impressive. Playing them I had a lot of fun, as I loved the concept of "Oh, I want more guys... let me cast Invocation...". It was just a blast to play, and I slowly got to where I could do well with them too. It wasn't an auto win, but I did very well.
The conversion opportunities to turn something undead, and add character was huge. It allowed you to have all these little back stories. My VC probably have the biggest backstory, albeit a simple one, but it I've kept it going over time and it's been fun.
I took a break from VC with the new book, but I'm back and enjoying them again. I can't wait for the new book too so I can field large units of skeletons again, as I have always liked the concept of them (I blame the old stop motion Jason and the Argonauts apparently making an impression as a kid). The Macabr vison of the ranks of skeletons in a VC army, especially when the undead version of another faction, just makes me grin evily.