Although popular, personally, I have never met anyone who would have implemented more than half of the mentioned Design Patterns. Yet sometimes, even unintentionally, I have heard of a pattern that has been implemented over and over as a common solution, usually by my classmates. Do you have such a thing? Maybe you could match its structure to the one described in a book? Or are you familiar with its name? Personally, the most used one would be Singleton. I hope to learn yours. I was introduced to it when I was making my first steps in Unity Engine. Implementing it was a way to have some common things set up between the scenes, if I remember correctly, and from then on, I often used it in different technologies, from Java to TypeScript.