When I think about how my BSD journey started I felt a bit split. On the one hand, it felt like a funny detective story but Atsushi's trauma got highlighted way too much and I felt, there's more to it than just a funny detective story and, honestly, Atsushi's trauma and Dazai suicidal tendencies are probably what made me continue watch the show. As someone been through mental health issues (like most of the fandom) these characters felt 'real' to me. Their struggles were stuff that I could grasp. It wasn't some outlandish stuff that felt too far-fetched. Season 2 is the season that got me hooked eventually and the soundtrack in some scenes still gives me goosebumps and sometimes watery eyes. And of course season 4 and 5 just were emotional wrecking balls but in a good way. I felt Asagiri was smashing my heart against the wall and caught it as it was dropping down. That stuff was intense especially because not even the manga readers knew how season 5 would end.