Summary: Time and time again, Bowser's plans were constantly foiled and peace was restored to the Mushroom Kingdom, thanks to the great hero, Mario. The people of the Mushroom Kingdom praised his heroics. It was said that as long as Mario was alive, the kingdom's prosperity would last forever. Sadly, peace did not last long. Mario was crowned king of the Mushroom Kingdom. There was no end to his tyranny. The land dried up. The people starved. And thus, the kingdom perished. Mario now had his eyes set on conquering the rich Koopa Kingdom, and so, he left the ruined kingdom. However, in the supposedly vanished Mushroom Kingdom, the people swore revenge on Mario. Now, a movement against him began to rise.
The reason I like it: The ASM modifications to Super Mario World still blow me away, and despite having no custom music, it still maintains a creepy atmosphere.