Agreed. It's quite easy to notice someone wearing one and that easily segues into questions about which discipline they chose, what school they went to and inevitably, how they use relatively little of their engineering/school knowledge in their day-to-day job. ;)

Indeed ...

It's fun to joke around before telling people the real story - "oh, this is my Serbian Mafia ring ... all the guys in Belgrade have them"

Non-engineers notice mine all the time too. I'm so used to wearing though (and sort of forget that I am sometimes) that usually there's a few seconds where I'm very confused as to how they know I'm an engineer.

It's also great for tapping out a rhythm on any hard surface you can find.

My girlfriend calls it a cult -Which is partially true if you were to attend the ceremony-. There's an unspoken bond with most engineers that we can get along quite easily when we recognize the ring which adds to the "cult" persona