In the world of writing articles to share our knowledge, experience, learning from the community, which of the three popular developer platforms do you prefer?

All are wonderful sites and hold much value in their own ways. Each of the three have a magnificent community that could never be replaced. But if you had to choose one and only one to stick by for the rest of your developer career - to learn from, to share on, etc. - which would it be and why?

Happy coding!