Spoiler
So while reading a thread in the Elder Scrolls Series Discussion, it hit me that the SI is pure Irony! The objective of Oblivion's main quest is to stop the Daedra from invading Tamriel, yet in the Shivering Isles expansion, the PC ends up as a Daedra! Forever banned from the world he/she helped save! Anyone else think of this or wanna comment?