I also experienced a vampire attack on Whiterun. There I was, sauntering out of my house one morning when I saw several of my friends being butchered by vampires! I could not save the female blacksmith - one of the best traders in the game due to her being available to buy stuff really early in the morning and so handy being just next door. I killed the vampires and then used the console to resurrect AA. Despite the fact that she was still speaking to me and trading, a messenger came up to me and told me that I had been left 100 gold in her will. Luckily I had recently saved, so I reloaded. The next day, the same thing happened and this time the female blacksmith was murdered, then 'resurrected' by one of the vampires as a zombie to fight on his side. When I killed him, poor AA dissolved into a pile of ash from which she could not be resurrected. Again I reloaded. Not liking the fact that my friends in Whiterun were being butchered and not finding the constant paranoia / reloading issue whenever I went home to Whiterun very pleasant, I decided to do something about it. Guessing that if I completed the Dawnguard main quest the attacks would stop, I rushed my way through the campaign to beat Lord Harkon and restored peace to Whiterun. All good fun, but the problem I have with it is that I would have liked to have taken my time over the Dawnguard campaign, like collecting the Dwema schematas for various crossbow upgrades, etc. The vampire attacks really forced me to rush to the conclusion, which seems a waste of a good set of side quests. Fulfilling the Dawnguard side errands now that he vampires are all dead lacks any sense of urgency. Conclusion? While the vampire attacks are exciting and add to the game, I think that certain NPCs should have been made essential. To lose traders and important citizens of Whiterun and other cities just isn't on. The world of Skyrim is underpopulated as it is without that. Previous to Dawnguard, the dragons were a major problem in terms of citizen killing, particularly for characters who spent a lot of time outside. The female trader in Winterhold kept being fried by a dragon on her balcony, for instance. I also remember witnessing the Nord and Redguard husband and wife blacksmith team in Dawnstar being disembowelled by frost trolls on one occasion as well. I just can't help wanting to reload o such occasions. Sentimental? Perhaps.