Most of your earning opportunities (freelancing, blogging, designing- programming) require hard work and can’t be made in your sleep. (I wrote about it: Is It Only a Myth? – the Genuine Truth About Passive Income)
I love my job, my profession. I love writing so much I do it also in my free time, evenings or weekends. I can’t imagine my life without work… or, no more than a couple of weeks on holidays.
By the way, Buffett also continues working, with 89 years, I think.