What's there not to like?
Really good storyline, that takes you from the old times to the new millennum, where you can use firing arms (which are not that good anyway :)). You can use magic in the game, that is REALLY helpful. When you need to restore your health, just pick any person in the street, take it to the darkest alley and suck out so much blood out of him, that it would be enough for you and not be fatal for the victim.
There is so many strange people to meet, that may try to abuse you, sign your death sentence with making appointment with frenzy bosses...
There is possibility to walk in a goup of people, but it will be more difficult to control everyone - create a srategy, make an attack and use magic. The bloodthirsty vampire-enemies will block your every way just to have a piece of your honourable blood.
Take heed when walking in dark places - there might be headhunters waiting for you around the corner.