Aside from his splendid music, very little is known of Grandpa Bach. What we do know of him suggests that he was not a very mild creature. One story about him after another conveys that impression. I will not recap the information; anyone can do the research for themselves. Do I think he was an ILI? Probably not, given the history he seems to have of being temperamental. Do I think he was an LSE? It would be surprising to me if he were, because I love his music, and LSE is not one of my more compatible types. How about ISFp? Nothing about him and his music suggests that to me, so I think not. If I were to guess, I would say he was probably of an EJ temperament. If not that, he was an ESTp.