I've had a passion for reverse engineering since I was a young child. I have this unquenchable thirst for understanding what makes things work - from people (psychology) to reverse engineering malware, and even to tearing apart hardware discover physical security vulnerabilities.
One of my favorite projects was breaking down the Nike fuelband (pre-apple watch) communication using an ubertooth one bluetooth sniffer. It was quite interesting to see what kind of data was collected by Nike and the lack of security measure put into place...