I like to think of Sisyphus a bit like someone waiting in line for a rollercoaster or a ski lift. The pushing is a slog, but then you reach the top and WOW BOOOM the rock cascades down the hill and it's AWESOME! Time to start pushing it back up again.
Yes yes I know Sisyphus is a metaphor for the pointlessness of life - but that doesn't mean you have to take it at face value.