French!! It's such a beautiful language I learned it in primary school and have taught myself a bit more over the years, it and German (as a PP said) are pretty similar to English in structure and rules so it will be a lot less confusing than trying to learn a completely 'foreign' language like Japanese etc, kwim?

Ahh, French is just so pretty, how could anybody NOT want to learn it! I wish I was better at it! Good luck, have fun with it