I did become a vampire, by accident. I was roleplaying an Imperial Spell-Sword who had a basic model of morality, nothing out of the ordinary and I didn't notice the "Contracted Disease" and it went unnoticed until the first dream.
Now..already having established my character wasn't a follower of the Gods or an Alchemist, I was a little stuck and ended up turning. Then I became happy. I went with the story that the curse running through my veins had warped my mind into a more evil character..which gave me a reason to join the Dark Brotherhood...which is my favorite storyline. All in all, it worked out well. Until I got bored with the character as a whole and murdered everyone in Cheydinhall...good times...good times. Thanks for reminding me of my time sink that I MUST play now.
Jerk.