If you're looking for (almost) strictly graphical improvements then I can't recommend MGSO more highly. It has a lot of customizable options, but above all else makes the game look pretty darn gorgeous. It's also been easier to install lately, it used to be you had to go through a half hour long process, following a tutorial on Youtube. But now it's pretty much all automated.
http://morrowindoverhaul.rpgitalia.net/
Got the actual link to it, i'm [censored] when it comes to this stuff
e/ nvm just found some download links, am i downloading the right one, december of 2011?
Check out the links in my signature , The mod recommendations for new players will tell you all you need to know.
thanks, checking this out now