SP is the oldest similar to XXXX, Export is my favourite and the other two are the newest not really a fan

Oof E190?

Standing under the fuselage of a Airbus A320 in the pouring rain holding a torch for the “senior” engineer, while watching him fail at troubleshooting a simple door bell circuit.

That was the straw that broke the camels back, I could not spend my career working under someone like that.