My first "real" programming language, which I learnt when I was 12.
Prior to that, I'd learnt the basic concepts of programming first using a drag'n'drop tool called "Game Maker", and then by (re)-writing significant amounts of my games' logic in its inbuilt programming language.
Encountered along with Rails at a work experience placement. Was thrown in the deep end and didn't like it, but ultimately led me to discover Python and Django.