Muramasa: The Demon Blade/YMMV

Awesome Art: The game is packed to the gills with it.
Awesome Music: The whole soundtrack is gorgeous. Music by Bas isc ape.
Crowning Moment of Funny: Jinkuro possessing Momohime's body to get drunk, and Momohime complaining about the resulting hangover.
Game Breaker: Just about any swords with the spinning wide range special arts.
- And the sharpening stone that prevents your sword's Soul Power from being lost. Press Y button for instant win.
- The Narukami bracelet also prevents any Soul Power loss from using special attacks, only it lasts forever. Since you get it for beating Total Pandemonium, it's almost a Bragging Rights Reward, except the game is skills-based, and you can never become so powerful that the game becomes a walk in the park.
- There's also the Nio bracelet you get from the dragon god in the post game of Momohime's story. This item makes the attack of all swords 700, which becomes brutal when comboed with something like Gale II. Only 3 swords are made worse by this item, and you don't get them until you start getting the 3rd endings.
Goddamn Bats: Pheasants and poison moths. Tengu can also be pretty annoying, since they usually show up in areas with differing elavation, which makes chasing them down or avoiding their attacks a pain.
- Kite ninjas as well, as they love to fly just out of reach while pelting you with shuriken and bomb, and have a nasty habit of blowing up in your face when they die.
Heartwarming Moments: When you forge the last sword, Senji Muramasa is very touched for achieving it.
Moe: Momohime, when she's not possessed.
Nightmare Fuel: Some of the bosses are truly awful-looking. Especially the giant centipede. (shudder)
- Inugami is disturbing as hell.
Scrappy Mechanic: Enemy scaling rears its ugly head. You can be fifty levels above the recommended minimum for a lair, with thousands more HP and ten times more attack power than you're 'supposed' to have, but they still hit hard and soak up the punishment you deal out. So fighting random battles doesn't do you much good... but you have to level up because there are minimum stat levels on the swords.
Ugly Cute: Ippondatara's boar form. When you're fighting him he just seems like some regular monster, but then you beat him and he asks you to spare his life in exchange for information. Gets even more cute when he explains that he transforms into the giant monster you fought, because he wants to protect his hot spring from humans. He tells you this while bathing in the hot spring himself with Momohime and Kongiku.