Maybe be a little more forgiving on spelling? It didn't take "From Dusk til Dawn", so I tried "From Dusk to Dawn". When that didn't work, I tried Tales from the Crypt: Bordello of Blood and John Carpenter's Vampires, both of which have enough similarities to give them a fighting chance of being right... before ultimately giving up.
The book is I Am Legend, but it's been turned into three movies: The Last Man on Earth, Omega Man, and Will Smith's I Am Legend. The first and third involve vampires, so technically both are correct.
Also Nosferatu, Shadow of the Vampire, and Hotel Transylvania. Heck, if you're going to include Van Helsing and Dark Shadows then you could find room from Underworld and Fright Night, as well.
And what about manga/japanime as well? 'Vampire Hunter D', 'Rosario and Vampire', 'Vampire Academy', and maybe a small host of others that I don't know.
The quiz is titled "Vampire in Movies and Television," not "All Vampire Movies and Television Series." Though that may make a fun quiz too, it'd be ridiculously long.
Although Angel DID become human (briefly) at least once, a better clue might be "Spin-off of the above, about a vampire who regains his soul and feels guilt".
Yes, the show is unequivocally not about a vampire who becomes human and feels guilt. It's about a vampire who regains his soul and feels guilt. He remains a vampire. As ayjayh alluded, there was one episode where he got to be human again, but the event that led to it was reversed (so that it never happened) by the end of the episode.
The quiz is titled "Vampire in Movies and Television," not "All Vampire Movies and Television Series." Though that may make a fun quiz too, it'd be ridiculously long.