I think some of it has to do with his famously difficult personality. Colleagues found him unbearably arrogant, and he seemed to have a chip on his shoulder, pr

I think some of it has to do with his famously difficult personality. Colleagues found him unbearably arrogant, and he seemed to have a chip on his shoulder, probably arising from his highly contentious relationship with his father. Von Neumann on the other hand was reportedly extremely charming and funny, and great fun to have at parties.