> Notice that Camus doesn't say HOW to imagine Sisyphus happy. How do you?

The gods controlled the ascent, but they forgot to regulate the walk back down. In those brief, unburdened minutes descending the slope, Sisyphus is completely outside their authority.

You can imagine him however you like, laughing at the absurdity of it, studying the mountain, or simply enjoying the breeze. It almost doesn't matter. The walk down belongs to him.

The gods imposed the sentence. Sisyphus decides what it means.

This is Camus' idea of the universe and how to rebel against it by owning and enjoying the small freedoms.

Personally, I believe how you see Sisyphus happy reflects how YOU would enjoy your small freedoms, and this shows how Camus often wanted people to do philosophy on their own.