Working at 80% would be the dream.
I don't have a hobby or a passion I can sink lots of time into. Even when I work hard all the day at my uni, I still end up wasting too much time on pointless thing on my computer. On vacation I spend most of my time wandering in my home without any real goal. I'd just die of boredom if I lived like that for more than 3-4 months I think.
At least if you work hard you can climb the corporate ladder and then look down on the scrubs below you.
Maybe I'm just lucky to sort of like what my future job will be about.