I can remember the stark contrast between Bjarne Stroustrup (C++) and Brad Cox and Tom Love (Objective-C): the former humble, self-critical, explaining the other two bragging, jealous, unsympathetic.
Thomas E. Kurtz (BASIC) I also read with much interest. BASIC was my first programming language (which I learned from a BASIC command reference, from A to Z, on an MSX and MSX-II
computer). What I can remember about it is that the interview really showed how old he is (already was at the time of the interview). He understood none of the questions about more recent development in computer programming.
About the Charles H. Moore (FORTH) interview I remember how weird the guy must be.
But I also found the other interviews entertaining, instructive and worthwhile.