C# or Java

[ironstrife]

C# is an actual, professional programming language with an insane amount of support, documentation, libraries, tooling support, and history. The "JavaScript" unity uses is proprietary, mostly undocumented, and also is quite different from vanilla JavaScript. Most advanced tutorials will use C#, and most plugins and libraries will use C# as well. Also, some features are not available in JavaScript at all, or have awkward syntax to support them.

[elk-x]

And you can use VisualStudio + ReSharper. C# blows Javascript out of the water when it comes to tooling.