Topic: The two cultures of mathematics.
This is pretty interesting. Essentially you have "problem solvers" who focus on solving specific problems and derive principles from them sometimes, that can cross connect and grow math. On the other hand, you have folks who develop theories. These theories are working off of or towards general principles by definition. It's not a rigid, rather it's a fluid distinction, but exists. It's especially interesting given most of computer science is more discrete / combinatorial than theoretical in nature. At least that's the impression I get. I don't think we have *too* many broad sweeping theoretical underpinnings, except for the sparse ones that work within number theories and stuff like that.
Paul Erdos was an amazing man. The most prolific mathematician of the 20th century. Wrote over a thousand papers. (Co wrote?)
More of a problem solver.