GWBasic. My grandmother was a Cobol programmer and was visiting, I had this cute book where either illustrated robots (or aliens) talked in Basic, and I happened to have a computer with GWBasic.
Eventually I got Qbasic (I wanted a compiler).
A few years later, I picked up C after a friend of mine got into it along with HTML, which my friend was also into.
I picked up C++ soon after (natural progression from C), along with Java (we used it at a summer program).
When I got to college, I learned Scheme and LISP thanks to one of the department's intro classes, though I only fully grokked Scheme when I had to teach it.
After taking an class on computability (and using Vim), I decided regular expressions were super. (Who'd think theory would be so practical?) Perl was a natural stepping stone. (I also had some experience with it from websites, of course.)
Perl and CGI were a hassle, so I learned PHP, which I don't much like. It is not a hassle, but it is ugly.
I picked up Ruby when I was involved in teaching a class that planned to use it, and I found it much to my liking, and tend to prefer it as scripting language over Perl.
I've recently dabbled a bit in x86 assembly (primarily for debugging) and Erlang (just for fun).
Nowadays, for work, I spend a fair amount of time programming in a custom CLIPS-like rules engine language that we implemented in house. (In addition to C++.)