Every so often I enjoy looking at mathematician Doron Zeilberger’s page of opinions. (He also has some other nice stuff).
I enjoyed this recent opinion, especially the stuff about Gelfand’s approach to seminars – to constantly interrupt the seminar until every point is made as simply and clearly as possible.
Other opinions I particularly enjoyed: 1, on the value of publishing incomplete proofs, 2, on confessing dumb mistakes, and 3, on different types of creativity.