So glad you're reading the Kingkiller Chronicles. Rothfuss is a woefully slow writer, but these books are some of my favs. The Audible versions are well narrated. You might also read the Red Rising series by Brown, which is also underway.

What makes a gentle man angry? We all have our lines in the sand. It may be he can endure so much pressure but no more at a point. Or he may have certain moral issues on which he will not bend.