Do introduce yourself to the senior flight attendant as you board (known as "responsabile"), and normally you will be invited to turn left and also introduce yourself to the pilots unless they're too busy (I know this would be unusual in other airlines but it is expected in AZ).
Once upon a time you would have had better-than-even chances of an upgrade, but unfortunately under the new management a threatening letter was sent to all AZ crew prohibiting ad hoc upgrades.
Finally, don't forget to list prior to flying: AZ will no longer issue you a boarding card unless you are listed on that flight, even for medium haul
MD