There's a quest that you do for the Count of Skingrad that's called Vampirism Cure, but i don't know exactly how you can get it. Oh, also i heard that you can get infinite money after you do the quest by keep asking Count Skingrad about your reward for the quest. Never tried it though.
Personally, i think being a vampire on Morrowind was pretty dumb. You get a little greener and get killed easier. You definitely had to use your imaginition ;)