When I was in college in engineering, I noticed a woman dressed in a sister's outfit always in the labs, I think she was studying EE? She was running PSpice. Very interesting.
I've known a large number of Catholic sisters over the years. They've been, without exception, some of the most interesting people I've ever known. When my mom was in the hospital last year, she had regular visits from an 89-year-old sister who came just to chat, even though my mom isn't Catholic (and there was no attempt to proselytize, I should add). It as more just a case of she enjoyed being able to provide socialization with the elderly women who were in the hospital.