I have always wanted to blog, but I am wondering what the scope of one’s blog should be. Is there a limit? For example, if I am an aspiring designer/developer, and would like to blog about web stuff, can I also blog about my adventures as a musician, gamer, and as a parent also? AND include a portfolio? It seems weird to include a vast array of topics, but it also seems weird to have different sites, too.
I completely agree with @JoshWhite. You will be overwhelmed if you try to blog about everything. You need to find what you are truly passionate about and create a blog around that. If your first thought is about making money, the passion will quickly fade when you realize how hard it is to get a successful blog off the ground.