i would like to direct any and all TES fans to a few sites.
For complete info on the TES series goto http://www.uesp.net
Oblivion and Morrowind modding goto http://www.tesnexus.com
For a complete Ovlivion overhaul mod goto http://devnull.sweetdanger.net/convergence.html
This one is a major project that combines 4 major overhaul mods so they work together more smoothly. This one is not for the faint of heart.
Hope this helps you TES fans.
the fcom convergence mod is pretty dang sweet. its obscuro's overhaul, martigen's monsters, and like two other ones that add a crap load of items and things into the game. i played it with those on, its MUCH better, but be warned, MUCH harder. Almost gothic like to start.
Morrowind is still my favorite, mostly because of the environment (physical environment) is alien, interesting, but still immersing. Oblivion was too shiny, too perfect, too cookie cutter, it just didn't want me to be in the world.
Granted Morrowind has some issues, especially combat, but the world itself is great.