Ultimately what makes software testing fun and challenging is because it needs you to interact with people. You have to talk to both the software development team and the application users. You have to understand what they care for and why. You have to ask questions and the answers to those questions guide what you do when you test. You can test in a silo but that doesn’t help you learn anything deeper, you can’t thrive if you stick to the things you already know. You grow because you take in all these perspectives and beliefs that other people have and test them against your own, for the goal of making better judgments about how to test the thing your testing and why you’re testing them in the first place. It’s not easy, because you have to care. The challenge is that you have to learn a great deal of many things, you have to regularly check the landscape of where you are, and you often need to reflect about what you’ve done and what you want to do next. And on the journey of overcoming the challenges you set for yourself is where the fun is.