Usually there's the 1-2 tools you're most comfortable with, unless you're a true generalist. Most people can't be incredible in Rails/Django/Spring/Node/.NET at

Usually there's the 1-2 tools you're most comfortable with, unless you're a true generalist. Most people can't be incredible in Rails/Django/Spring/Node/.NET at the same time, you have to pick 1-2 things you excel at. You can be efficient in 5 tools at the same time, but not an expert (for most people. some people are great at everything they put their hands on).