It's all dependent on your requirement . What are your going to develop and what is your fronted also . I can only give you example of web development.
Node Js is very popular for web development and equally easy to implement also .
Learning curve is less so you can quickly learn Node Js. Many wrapper are available on NodeJS which can provide you everything very easily like SailsJS (Implemented on Node JS).
But again , As i told . Everything depend on requirement . Enjoy Coding :)