I think most hypotheses are the result of first having observed something you do not have an explanation for, and the desire to find one.
I didn't go through my whole process, but, in most cases, that isn't how I develop a hypothesis.
My usual process is to review the literature pertaining to the research I want to do, and then to identify gaps in the knowledge. I then make a hypothesis as to what knowledge I think might fill a gap. For instance, I might consider a disease process in which I know that the exposure happens one week before the symptoms, and try to make an educated guess as to what is happening between the two events. I then design the experiment to ascertain whether I am correct in my educated guess or not. And this is an iterative process: once I complete that phase of the research and analyze the results, I then try to identify the new gaps in knowledge which have been revealed during that phase, and plan further experiments (guided by new or altered hypotheses).