I like bloodlines having "themes" in their powers. Gisk, you and I need to gm this. I like your setup. Rumiko, I also really like your ideas about "making it real," in having government regulations etc. However, government could get out of hand. 

Let's make an rp with a half masquerade, so players can chose to escape laws as much as possible. I'll make it so that some humans know vampires exist and can become dedicated to destroying them. Otherwise they are urban legend. You can play good, evil, human, vamp, maybe even a rare werewolf here and there. I think I will give my character some kind of motivation to gather others and lead them to victory. People could chose to join me or oppose me; it would be fun. 

I'll make the OC either tonight or tomorrow. Pass word or tell me if you want co-gm, have new ideas, etc.