Tell people why they should be using Extended Events. Tell people why Extended Events are a horrible mistake and shouldn't be used (be ready to back that one up though). Tell your perspective on how to do backups. What interesting problem have you solved recently. What boring problem have you found a different solution for? Is there a good way for a MS SQL Server expert to get going in PostgreSQL?
You have lots of choices. This is simply a chance to share your knowledge. Please, do.