Contrary to most of the people in this thread, I've never programmed in C# or Java. My focus has always been on C++ and PHP, the latter having a fair amount in common with C, sans the memory management. PHP is a fun language, and I've written a lot of code, both from scratch and using frameworks, in PHP. However, I think C++ is my favorite language, it really seems to lend itself to both creative and DRY programming, and the OOP implementation makes it really powerful in that regard. I also know Python and a little bit of Ruby, the latter I don't care for so much (syntax just seems really weird, although I have to admit I haven't studied it much, so that could be why). Python is a really fun language for doing simple tasks or writing a basic interface to something, it generally a nice scripting language.
I don't know if I should count JavaScript, as I really only know a few fundamentals, it was just recently that I even studied implementing more advanced functions (by more advanced, I mean more than 'return document.X' type of thing), but it's something I've worked with, when doing web development.