In addition to being an incredibly productive, paradigm-shifting scientist, Dr. Barres was also honest and down to earth about the realities of the field. I'd recommend anyone going in to any type of graduate study to read his essay on how to choose na graduate advisor: <a href="http://www.cell.com/neuron/abstract/S0896-6273(13)00907-0" rel="nofollow">http://www.cell.com/neuron/abstract/S0896-6273(13)00907-0</a>