I'd go for suggesting an organic approach... start up your game and get your starter villagers and just roll with it and see what you feel like once you've got your town map & villagers, they can give you an idea of a theme. When i got my second copy I was going to go for a barren/wasteland theme but just couldn't do it to my fluffy villagers ahah. Sometimes the town will dictate what theme is best. Good luck with your second copy! Spooky does sound fun, though could be hard to maintain