Let me share with you bro's of this excellent thread two mods for oblivion that are great!
First off:
http://www.tesnexus.com/downloads/file.php?id=36303A mod that adds Elsweyr to Oblivion. While not finished, the details and everything in it is customly yet well made. Adding hundreds upon hundreds of items and shit, from weaponry and armour to Khajit items, and even old classic drinks like Mazte and other morrowind items. And of course, new creatures to go with the setting
It also has a few quests around, especially in the cities. A generally great mod for those wanting some more exotic locale or has an interest in Elsweyr.
Next is:
http://www.tesnexus.com/downloads/file.php?id=22555Adding Valenwood. Compitable with Elsweyr by downloading a patch in the links.
It's far less completed compared to Elsweyr, but the terrain itself is oft beautiful and uniqe. It got less custom items, details and shit (it has some though), but the landmass itself is well made. Also has a few quests here and there. But as said, it's far less completed compared to Elsweyr which is packed with stuff