Pure fun.
Every once in a while a game comes along that just makes you... happy.
Gameplay
If you've played Super Mario RPG, this game will feel very familiar. It's the basic jrpg layout with action commands to involve the player more in the battle. The only thing that REALLY makes it stand out is the fun, memorable boss battles. They can be tough, they have great (and unique for every boss) music, and very interesting characters to battle against. The only problem is that the non-boss fights can get repetitive every once in a while.
Story
Bowser kidnaps Peach. Mario saves Peach. Oh, there's seven stars you have to get. Yeah, the story is lame. But the characters are where the game shines. They can be funny, they can be cute, they can be emotional. Surprising for a Mario game, but I've come to expect it from every Paper Mario by now.
Graphics
While not technically amazing or anything, the game has a certain charm. Its paper theme and cartoony style make it pleasant to look at.
While I would have loved to give this game 5 stars, it has some flaws. Mainly in the fact that the battles can get boring sometimes.