T4R.
I'm handy with Python and C, and will try to absorb some C# or C++ in the near future if I can tear myself away from Bioshock replays, given that those are popular low-level options for game production.
Learn C-style C++ and C# or Java... the most common enterprise-level languages. Python will serve you if only just to teacfh you how to think. Or if you want to go web development... I know I often feel like I need to go read a tech blog just to figure out what the latest language or toolset is that I should be learning, so good luck on that.