There is a fantastic, GIANT mod (more like a fan add-on) made by Russian modders for Oblivion. It's a very long mod full of new content, Russian humour, new lands to explore and so on. It gained huge following in Russian-speaking community, but the English translation (I translated a few bits myself) remained relatively unnoticed. So I want to share it with you.

 

This is a true gem of Russian modding. I suggest you all try it.

 

https://www.nexusmods.com/oblivion/mods/48810/?tab=description

 

This mod will swallow you for a week at the very least, I promise.

It involves pirates, a trip to Akavir, a gay bar, a Mortal Kombat-alike fighter tournament, necromancer conspiracies, search for treasures, detective work for Imperial legion, bad trips and much, much more. I believe it plays twice as long as the main quest.