Touhou, and it's sitting on my desktop.
Inside the folder I stick everything related to Touhou on my laptop, including the games themselves, music files, replays that I need to remember to watch/record+upload, a shortcut to the ShanghaiAlice users folder for easy access to 12.5+ replays, images, pokemon cards of Touhou characters, and various random text files I made at some point.
The games folder is then sorted by genre, with Bullet Hell, Fighting, Platform and Other. Inside the Bullet Hell and Platform folders is just a folder with the game name which has all the required files there. The exceptions are the PC-98 games, which are in a folder called "PC-98 games with Emulator", and danmakufu, which is in the th_dnh folder because I couldn't be bothered to rename it.