Ask HN: Webapp Sideproject – what boilerplate makes sense?

Starting to build something for myself on the side with my regular job and while we have some great stacks out there, is there a fast way to get started on a webapp framework?

Ask: Help me find the easiest to get started, lean and interesting web app framework to use for my side project.

Background: - I am well versed at HTML, CSS, JS. Have used Backbone.js extensively earlier. - Have read all the usual blog posts on X vs Y and I really want something where I can develop fast without worrying too much about scale or maintainability as this is really just for myself.