Finished reading this recently. Where do I go from here with Faulkner?
You certainly have a lot of places to go. If you appreciated the style of Sound and the Fury I would give As I Lay Dying or Absalom, Absalom! a go.
If, on the other hand, you want to see what else Faulkner is capable of, I highly recommend Sanctuary (sort of a pot-boiler novel), The Snopes Trilogy, and his short stories.
That said, I would also recommend diving blind into his works, particularly his older ones.