Thanks @jobsande. You are right there are always numerous angles to look at for each set of data, no single person can get all the angles because we are humans and we think differently. As to how I choose my post , I just keep an open mind and often write it down when I think of something interesting then I go looking for data to support my reasoning. Sometimes it's the other way, I could come across a data set and I just start playing with it hoping to discover something interesting.