Cool topic. Like most people from The Netherlands, I actually speak several different languages. My native language is Dutch. I am fluent (reading, writing, verbal) in English. I also dabble a bit in French and German -- but that's mostly reading.
Dutch children are taught a second language at a very young age. Even grade schoolers are fluent in English these days. We learn French and German in high school.
I get to practice my English every day. I use the internet, I read English books, I watch English TV, listen to English podcasts and music... I have no choice but to practice
I love being multi-lingual. It really helps with your thought process. Some concepts are easier to explain in English then in Dutch. Dutch is actually quite a difficult language, so I even use English phrases and shorthand in casual conversation to save time.
I'd love to learn a new language. Something like Russian would probably be fun to learn!