Frankly, I think one of the best languages you can learn would be C++. It's a very powerful language and it gives the programmer a lot of power to do all sorts of good (and bad) things. Unlike scripting languages, you'll need a compiler to get started. One word of warning if you decide to delve into C++, it's a complicated language and it is not horribly easy to learn. However, I think that if you can get a really good feel for a language like C++, you can very easily pick up other languages, such as Java. A lot of programming languages today seem to have some sort of background coming from C or Pascal. If you can learn a little bit of C++, I think you'll find that learning other programming languages will be easy.
in reply to What languages to learn?
I'm not trying to say that C++ is always the most useful language in the world (especially in the world of web) but, from an understandability point of view, if you can understand C++ well, I think you're well on your way to understanding a lot of other programming languages.
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