Like many others, I started on EoSD because of wanting to start at the beginning. Not regarding the PC-98 era, since I thought they were pretty outdated, and was a bit too lazy to set them up, but now that I've played through all of them, EoSD has sorta become that for me too. It's funny though, when I started EoSD, I could never figure out the hitbox, but after playing the others for a while, the hitbox got sort of ingrained in my memory, and now I feel EoSD has some of the easier main stages, the only one out of all of them I can consistently 1cc. Personally, I would recommend starting with any other of the Touhou shooters ( except SA ) if only because of the visible hitbox. ( I know there's a patch for a hitbox for EoSD, but I'm not a huge fan of patching extra features in my games. )