He also organized a university wide book club - including making books available at designated tables in the cafeteria, and hosting the author for a speaking event. "Guns Germs and Steel" was popular at the time, and he used that as an example of the type of book they would read.
Everyone knows about the Disruptive Innovation, but he also wrote "Disrupting Class" on how disruptive innovations would change universities/education - and put some out of business. On this vein he founded the Christensen Institute [1] a non-profit (in Redwood City, CA). I don't know a ton about it, but I've really enjoyed the research/ideas posted on their blog over the years!
Some here have posted about his faith. I've always thought it was bold that he had a four page PDF on his personal website [2] about his faith [3].
[1]: https://www.christenseninstitute.org/ [2]: http://claytonchristensen.com/ [3]: http://claytonchristensen.com/wp-content/uploads/2012/07/Why...