Eric didn't ask to be a vampire. In fact, he didn't even believe in them. Then he hooks up with a hot babe, wakes up with a hangover, and bites his tongue with his own fangs.
Which pretty much settles the question.
Now he's trying to hold down his day job while learning the rules of the Undead -- the most important being that bloodthirsty urges and predatory instincts are a real bitch.
Upside; Eric has the beautiful Sasha to teach him the ropes, including the magic he'll need to survive.
Downside; they're being hunted by members of the Church of Light, who are determined to rid the world of vampires.
Eric tries to be optimistic. After all, immortality is excellent. Who doesn't want eternal life? As long as he can avoid getting killed...