Hypothetical: At what guaranteed annual yield would you stop picking individual stocks?

This is just a hypothetical question, but let's say you could have a guaranteed annual yield for the next, let's say, 20 years. How high would it have to be for you to stop investing in individual stocks? A reasonable answer would probably be somewhere around 10%. But some of you are better than this, and then there is also the fun factor in stock picking, analysing and, well, discussing it with friends and over the internet. For me, it would probably have to be a bit higher, maybe around 14% to give up all this. Edit: I've just realized that it's probably very dependent on the person's net worth. I don't have a huge portfolio so that's why I wanted to be more aggressive. Having large portfolio, I would be certainly satisfied with much smaller %.