Yes, just not my daughter or her friends.
Actually, the physics teacher said at lunch the other day that he overheard one of his students telling another that I was 'scary'. It became the topic of conversation for the whole table (about a dozen teachers) for the day. Collectively we concluded that a little fear is a healthy part of the student-teacher dynamic.
Oddly enough, the subject of test anxiety came up at lunch a few days ago, too. Some of the teachers were saying they'd had test anxiety when they were students. I had to chime in by saying, "I don't get test anxiety. I give it."