My bug fixes almost always start out with “why the F did I do that?????” And then a long series of “oh…” before I finally get to the “ah hah!” Which is a moment I still enjoy after all these years. But fixing someone else’s code I’m more like “ok…I need to find the bread crumbs so I don’t get lost in this forest and end up messing something up…let me test this seemingly simple…ok yeah that broke stuff better roll it back.”