I actually find I feel differently for different projects. For smallish things that I made for myself, are useful but not particularly complicated -- things th

I actually find I feel differently for different projects. For smallish things that I made for myself, are useful but not particularly complicated -- things that someone else could easily replicate in less than a day -- I often license them MIT. Partly this has come from using so many other people's permissively-licensed packages in golang. But for larger, more complex projects that have significant skill -- projects that might take man-months to man-years for someone else to replicate -- I tend to want to use copyleft licenses.