I used to play a lot of D&D and 40k, had an Eldar army around 3k points for a few years, then with the new rule book, got a little tired of 40k heading in a direction that I didn't appreciate/enjoy.
When researching for a few other games my club started playing WHFB and I picked up some friends Dwarves, I failed miserably. Then because 99% of my D&D campaigns revolve around the undead/some crazy Lich being a demi-god I instantly jumped on VC.
Few early games and I fell in love completely. Although I've failed quite badly (mainly small points games with just Core) I love the idea of Necromancers and Vampires commanding a legion that they create on a whim when they think, lets go on a rampage!
TK never really interested me, rotting corpses and dead legions of barbarian warriors from ancient times raised under a ragged banner fluttering in a non-existent breeze are so much cooler than Egyptian themed armies. Finally Necromancers are my favourite, insane Necrarch bloodline, beautiful!