I've gone from Java frameworks to ASP.NET MVC and back to Java. I really miss ASP.NET. I love the convention-over-configuration in Microsoft's stack. Is your class a controller? Call it SomeClassController and put it in the Controllers folder. That's it. Setting custom routes and doing URL rewriting was a piece of cake too.

I feel that when I try to do anything in Java I always have to consult the documentation which slows me down. The good thing is that there's plenty of it on the Internet but it's still a productivity drag.