I try to keep it at least a bit more realistic by not choosing any arrival/approach in the world map and let ATC give me an approach when nearing the destination. This is a change in FMS and right now the Co is going to file a new flightplan after that. Which results in a bit of chaos (during approach).
On a side note: you didn’t fly the experimental A32NX so far, did you? It doesn’t work pretty good with world map planning, you have to change/correct the flightplan in the MCDU before takeoff everytime. Which results in a new clearance from ATC by the Co, right after takeoff (with a crz alt of 12000feet or something like that).