Testing is a profession! As a profession it requires skills in testing techniques, domain knowledge for the specific case you are working on, etc. A often underappreciated skill is communication. From the test perspective you need to communicate with a lot of different types of people, where each type requires it’s own approach. This seems simple, but is harder than it looks. It’s not only the type you need to be aware of, but also the person itself. In some cases a direct approach is the way to go, where in other cases you need to dress up your comments. Be aware of what you say and to who you say it!