After an informative discussion with my academic supervisor, the problem of what to do next has been resolved. I'm going to pursue studies in metaethics. Sounds like fun. In preparation for my thesis in this very question, I will look at some key works by Kierkegaard, Nietzsche and Levinas and follow the line through the history of philosophy to Badiou.
Do you have any favourite writings by these thinkers? How do you read them?