Here's one for those who have trouble installing mods.
The YogBox comes with an self-installer, and includes some of the best mods you can find. Things like DrZhark's Mo Creature, NoHero's More Health for a zelda like health improvement, and Kinniken's Millenaire. All in one, simple little package.
The downside: it takes alot
of room. Don't expect to add in Industrial mod, or other mods that uses lots of new texture. Otherwise, it's a great add-on, and a must try.