Are you kidding? My wife is totally a tester. She managed to find so many bugs in Vista, but I can never seem to reproduce them, so she must be really good.
Here's an interesting example, her laptop used to routinely turn off. It was really weird. I'd try it and it would never do it for me, but every so often, it would just turn off completely for her. After this went on for a while, I realized that she was actually wearing one of those magnetic health bracelets. Took it off and she never had another problem with it.