If you liked Jonathan Blow's lectures make sure to check out Chris Crawford's. A number of them are on his channel on YouTube. Crawford was more or less the first game developer to combine practical work with academic study of game design (and he's wrote the first-ever book on it). Your might know him as the developer of Balance of the Planet and the founder of the GDC; the latter he then left after the famous "Dragon speech", which is probably the first thing of his you should look up.