I just finished the life expectancy and GDP portfolio project. I found the project quite interesting, though perhaps a little limited in terms of the size of the dataset. Although I understand the necessity of doing this. I learned a lot of more advanced ways of plotting through personal research while trying to make my plots look neater (including the very useful bbox_to_anchor for moving your legend outside your plot boundaries!)
Please take a look if you like and, of course, feedback is welcome!