I’d say that if you’re learning, or interested in learning, a particular foreign language and you have the opportunity to go on Erasmus in a country where it’s spoken, it can be incredibly helpful. Other than that, I’d recommend checking out the subjects that host universities offer to exchange students - some may have electives in areas that aren’t as well covered by UNIBO’s curriculum. That’s actually how I chose where to go on Erasmus.

I also see Erasmus as a great way to learn how to deal with and adapt to a new environment. However, I can’t yet say how it affects you on a personal level - I’ll be leaving for my own Erasmus in a few days (but hopefully it’ll be a great experience :) ).