What better way to say "Hey! this car belongs to an Embedded Systems Engineer!!!"
Of course when I get one, it will be some swanky one with AUTOSAR compliant interconnected (via FlexRay/LIN/CAN) ECUs.
By the way this number plate is actually cool in one other way too... MFC stands for Microsoft Foundation Classes - which projects the image that the owner is a complete hardware AND software geek!!