My personal favorite for flawed reasons is Madoka because I was there for the live reactions to the infamous episode and it was magical watching everyone lose their shit. It was also my re-introduction to anime after being shamed out of it for liking sailor moon as a kid.
Your answer and others have convinced me I need to check it out. So don’t be down on yourself. If group wisdom is a thing (spoiler alert: it is) you’re in good company. You’ve added onto the answers others had and more thoroughly convinced me to check it out. Thank you for taking the time to answer