Necromancy is sweet, I've probably played most of my RPGs (both on computer and on paper) as Necromancer when they allowed me. This is why I agree to the fact that it is sad there is so little in game story/RP that allows the player to go into that dark path in TES...
I also remember there was an incomplete but yet very good mod for more complete and more "realistic" necromancy on Oblivion.
As Echo_ohcE did by pointing you to that text on necromancy in TES, I suggest you pick necromancy, any numbers of other magic schools and skills, and without thinking too hard about a build just immerse yourself into the game and your character.
What I want to say is that role playing is best thing to do to enjoy necromancy.
And, hopefuly, in a little while, we will get a good necromancy mod
