Why the focus on happiness? At a basic level, I’ve completely accepted that existence is absurd, and dammit, I find absurdity very funny. Even the statement, “life is absurd” is absurd as well.
That leaves us free to do whatever we want with that absurdity; as for me, I have chosen to enjoy it. All morality, all social norms and laws, every taboo, even my beloved logic, these all only exist to help us deal with how meaningless existence is. I think we’ve over-regulated existence: our current norms often keep us from getting a good laugh at life. Instead, these norms should function as tools that empower us to do more with existence than we could on our own, and to explore new and different types of pleasure.
Morality, for instance, is great as a guideline for how to get along with people without making them into enemies. That “getting along atmosphere” that morality provides has allowed for macro improvements like civilizations, as well as micro improvements like friendship. But when Morality is more than pleasure’s tool, you get things like christians hating gay people, or Orthodox Jews refusing to flip a light switch on the sabbath, or basically any negative aspect of organized religion.