I played the Bloodrayne demo and I didn't find it that exciting. It was obvious that it was meant to be another cliche console game.
Besides, the only cool vampire game I have yet to see was Vampire: the Masquerade - Redemption. It's rare to see some thought actually go into a game. There were no stereotypes (except of course the strong clan personalities) of vampire so it gave a refreshing modern view on vampires in the video game genre. Sadly, like all masterpieces it was shoved off to the side and barely recognized