Making Morrowind look better:
MGE (Morrowind Graphics Extender)
http://www.tesnexus....ile.php?id=5535 Gives you HDR (OMFG!), etc.
Vality's Bitter Coast Mod (Naise trees)
http://planeteldersc...iew=Mods.Detail (Only at slow summit I believe)
Vality's Ascadian Isles Mod (Moar naise trees)
http://planeteldersc...w...014&id=5981Vality's Grass (Still grass if you don't have MGE, animated if you got MGE!)
http://planeteldersc...w...014&id=7762Better Heads but I use Better Visages or whatever it's called, Better Bodies, Better Clothes, CanadianIce's Robe Replacer (something), Visual Pack 3.0, Classical Monster replacers/DarkNut's monster replacer, Dark Nut's weapon replacer, Misc Items Replacer, Better Books/Book Jackets, Morrowind Comes Alive + Living cities of Vvardenfall (has a patch, a Morrowind version of Oblivion's radiantAI), illuminated windows (like Illumination Within from Oblivion), and Texture Fix (gets rid of seams).
That's all I can remember, there's probably more. (I didn't include sound-helping mods)