Hedonism, as it says, is the moral theory that says pleasure is the greatest good: people should primarily live to maximalise pleasure (preferably their own). Existentialism is a very broad movement, but it puts very much emphasis on the individual and says every individual is free and responsible for his own actions / choices, so you can't blame society, authority, or whatever. Divine command more or less speaks for itself, then you think people should live in accordance to the work of God. Justice (fairness) is a bit vague, but you can say it rests on the emotion of fairness, that is, something is good when you 'feel' it is right. Strong egoism speaks for itself, it says everyone should exclusively act in their own interest. Kantianism, named after Immanuel Kant, states you should judge every action by its principle, that is, your action is good only if you would wish the principle behind it was a moral law for everyone (thus: you may never lie, for instance, whatever the consequences). Utilitarianism, my personal favourite, states more or less the opposite: an action is good if the consequences are good, no matter what intention involved, and the consequences are good when they promote as much happiness as possible for as many people as possible. Apathy means you're to lazy to even worry about all of this and nihilism says it makes no sense to worry about all of this because all norms, values or moral laws are total rubbish anyway.
So you seem to be an existential hedonist, which I don't believe is an official movement but it probably means you principly think every individual is responsible for their own pleasure and we are all free to do whatever deems us most tasty. That's quite cool.