Mods are a great way to drastically extend the life of a game, but what is your personal favorite? It could be a tiny skin or audio mod or a full blown total conversion.
Mine would have to be Lord of the Rings: Total War for Alexander. Totally overhauls the game to Middle Earth, a fantastic campaign with all the heroes from the films, the ring as a scripted event, the fellowship etc, and all the custom cities are close to completion, every faction is also a blast to play, from the better known ones like Gondor and Rohan to the Dwarves, Dale, Goblins, Free Peoples and Easterlings.
Mine would have to be Lord of the Rings: Total War for Alexander. Totally overhauls the game to Middle Earth, a fantastic campaign with all the heroes from the films, the ring as a scripted event, the fellowship etc, and all the custom cities are close to completion, every faction is also a blast to play, from the better known ones like Gondor and Rohan to the Dwarves, Dale, Goblins, Free Peoples and Easterlings.