Should I form a nonprofit?

I have a sole proprietorship, but my motivating goal isn’t really profit; it’s to create a certain kind of educational and cultural influence. I’m thinking about incorporating in to a nonprofit, but I don’t really understand the pros and cons, besides affecting perception of my intent. I can still charge speaking/teaching fees as a nonprofit, though (right?), and I’m not sure I actually want to deal with applying for grants. Are there other issues involved here I should know about?