I know I'm guilty of delivering a dissertation most of the time, but I suppose it's because I prefer a high level of detail in answers to my own questions. As a professional engineer, I can't make decisions based on quip answers, and I require in depth validations before making final decisions. Unfortunately, I'm not good at leaving work at the office, so I prefer in depth responses, and usually deliver in depth responses.
When I look for answers, I'm not satisfied by getting the "what", I like to know the "why" behind it too. It's on the scale of personality profiling, some people are focused on "what", some people are focused on "why", and some people are concerened with both... I, unfortunatley for you all, am one of those people...