I always thought of vampires, especially the young-adult ones, as a metaphor for sex - sucking blood, forbidden, taboo. I think they just ooze sex. Vampires are all the big themes in life in one attractive, bloodsucking package.
The last eight years have created a lot of deep-seated hostility. People take political decisions very personally, and today there is a constant, ongoing attack, with one side or the other being maligned.
For Ryan's Daughter I used a total of eight harps, something that was, at least, weird.