Let me share my motivation a little :). I love traveling, and the thing that I love the most when I travel is the people. I want to understand them and for that I need to be able to communicate with them. English is the sure-fire way to do that as it will open you with a lot of people from a lot of countries. That said there are a lot of place in which it's impossible to have a meaningful conversation with just English. A lot of Asian countries can't speak English really well and so I tried to learn a little of their language before going. It's not really useful but still something. There are also other reasons. For example if you like literature, reading a book on it's mother language IS THE BEST since there are a lot of things that can't be conveyed on any other language. If you like a particular product of a culture for example Hollywood it would make the experience more enjoyable. And finally you can't go wrong with language :). You can make a lot of friends and it is good for business as well!