Chosen to spend your Erasmus experience studying rather than getting a taste of the working world? Great decision. You, like I was, were clearly hungry for knowledge and keen to experience academia from a new cultural perspective. It definitely had nothing to do with the stress of writing CVs in a language that wasn't your native one, or the lack of paid internships due to the economic crisis.
Some people don't have to sit any exams at all while they're on Erasmus but the rest of us are expected to turn up to lessons and participate at least a little. Most British universities give MFL students near-total freedom when it comes to picking their modules; unfortunately a lot of us aren't very good at dealing with this huge range of choice. After nearly two semesters at two different universities, I can make a pretty good set of predictions about what kind of educational experience most of us will have while studying abroad.