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.
Another Isis (the band) fan :lets-fucking-go:
Deconstructing Towers is from Celestial, their first album. I'll never forget the legendary feedback section