The chosen forecourt should make little or no difference as most nozzles are made by the same company. Busier forecourts may suffer more wear/abuse.
The nozzle, if you look into the end has two holes, the large one to deliver the fuel and the small one to actuate the cut-off. As the fuel is delivered, a vacuum is created in the small hole. When fuel arrives at the nozzle end it is sucked into the hole and activates the cut-off valve. One than has been dropped, restricting the hole, can be a real pain. Turning the nozzle upside down, places this hole uppermost, so reducing the likelihood of splash clicking it off.
If getting it full is an issue, when it first clicks, wait a few seconds, withdraw the nozzle to allow the air pressure to escape, reinsert and try again.
Ford created the easy-fuel system. Petrol nozzles are smaller diameter than the diesel and petrol filler necks have been smaller for some time to try to prevent filling with diesel fuel. But it has always been possible to fill a diesel with petrol, until easy-fuel. Three catches in the filler neck are released by the nozzle to allow the flap to open. The bigger nozzle will not fit, neither will a petrol nozzle open a diesel filler. Syphoning it out is also difficult. Each car should be supplied with a funnel that will open the flap in case of filling from a can. Although they do look useful in case of toilet emergencies too.