I actually find the study important. You have a question to answer and you find the best way to answer it. It also has clinical relevancy and establishing or reevaluating animal models is important work. You shouldn't have the feeling that you didn't do much. You did more than many medical doctorates that I know of :D I finished my masters in molecular medicine in april 2014. Its life sciences with a strong focus on biomedical research. Pretty interesting and fun :) I just started my PhD at an axon regenration lab. We investigate the molecular mechanisms of axonal regeneration by using the optic nerve as our model. While the work is interesting, I will not continue my PhD here. I have always been interested in psychedelic research and the molecular basis of psychedelics and other psychoactive substances. Therefore I am trying to read my way through literature and maybe find a lab here in europe that would fulfill my curiosity towards this area of research :) What are your plans? Whats coming next?