Although 8 has more content, this is by far the best Touhou game everywhere else. With character designs that genuinely rival the iconicity of Touhou 6's.
The single best PC-98 Touhou game. Has 4 different playable characters, a crazy memorable cast of characters, and one of the best extra stages in the series. Also soundtrack bangs.
Even though there's no hitbox in the game, it was the big boom in the series for a reason. Chances are, even if you aren't a touhou fan, you've seen most of the characters that originate from this game.