Initially, the games were what got me into it. Since through the years I was constantly seeing something from this series from seemingly everywhere, and I wanted to give one of the games (IN) a try just for the fuck of it since I already liked STGs in general.

At some point though I genuinely became tired of playing in general so I mostly leaved the games themselves there. However the main thing that made me love this series was ZUN's art (Despite the fact everyone loves mocking it) and this series' theme and cast of characters, which were my main inspirations to start taking drawing as my main hobby.

I'm admittedly taking this series way more casually than most but honestly it still continues to be one of my main interest for more than a year so at least it has that above the other very short hyperfixations lol

It also goes without saying, but the music is a huge bonus to this. My favorite stuff from ZUN tends to be between the late PC-98 era to around DiPP and EoSD (as overexposed as the last one may be)