This is pretty much up to you. If you don't mind a steep learning curve you could start with C++ or Java. If you want something a little less demanding and easier to read, you might want to start with a Basic language (eg. Visual Basic).

Right now there I hear there is a heavy demand for Java programmers in the computer industry, so if you plan to go into that field you might want to learn Java. It is Object Oriented and has a library from everything to networking and threads to graphics and calendars.

IMO, Java would be a great language to start some simple game programming, As you get more advanced, you may want to switch to C++, which has many more API's(things that make ur program do cool stuff...) for things such as game programming.