Shit!!!!
Worst question I have seen around here.
I only had, at the moment, 3:
The first one was... unsignificant. Never learn anything important/relevant from him.

The second one didn't payed me for three months. I had to quit.
Still waiting for him to pay....... just being ironic his not going to pay.

The third one is bipolar and... well I already had stories shared here...so you can have a look.

I could say that I had another one. Is was my Father... best man in the world. My hereo. Learn the best things with him: Honesty, loyalty and Hardwork.

Sorry from any kind of mistakes on my writting. Long day and long night.