-Monsters: Martigen's Monster Mod. -Horses: Horse Management, Horse Armour Official DLC (Costs Money). -New Areas, Dungeons, Etc: Elsweyr Deserts of Anequina(sp?). -Weight, Fatigue: Depends on what you want, whether it's no encumbrance or more dynamic encumbrance. There are mods that do both. -Melee: Deadly Reflex or Unnecessary Violence. -Magic: Supreme Magicka, Better Soul Gems. I agree with Bencebence with all three of his suggestions also.