C# ("C Sharp") & Unity
C# is my current 'best' language, mostly used alongside Unity. It has been the main language used throughout my university course, and I have used it for the creation of game projects, including Fire Exit and Wittershale. I have also used C# in projects outside of Unity for smaller projects, but nothing noteworthy outside my course so far, as my primary focus is games.
Java & Bukkit
I have used Java at a similar level how I've used C#. While my experience with Java is almost exclusively with Bukkit (API for developing modifications for Minecraft multiplayer servers), I have been able to achieve a great deal with it; some of this can be seen in action on this site's page on Titan Rift.