Twice. South Korea and then Spain. I went cold turkey off Lexapro and Ritalin and was not warned off the side effects or that I should taper. That led to a very bad depression. I met a lot of amazing people but friendships felt very transient. As a non-native, job prospects are not as good. Learning a new language is fun and exciting, but until you are fluent, you feel very isolated. I thought I would be a long term expat but that's not how things worked out for me. Making a new life in a new country is a very romantic idea, but the reality of it is very difficult. However, if it's something you've always wanted to try, there's absolutely no reason not to do so before you ctb. Best of luck.