This is a great tip Moonsareblue. I use it all the time too. It helps me keeping all my Sims stuff and saves organized. Right now, I have several "The Sims 3" folders under Users\...\Documents\Electronic arts:
- The Sims 3 - Decadee
- The Sims 3 - Isbi
- The Sims 3 - Mad max
- The Sims 3
The last one (no renaming) is the folder I've been using for the last week, playing with Pets and Apaloosa Plain and doing my own little ranching program, like many of us :-) The other ones are used for my townie deca dynasty ("Decadee"), a spin off of a legacy challenge ("Isbi") and the 'Mad max" one was used for the tournament challenge, and now that it's over, I could delete it.
To have each "type" of game in its own Sims 3 folder helps me to have everything organized easily, with a minimum of effort, and to reduce the risk of any goofy action on my part! The only requirement is to have enough free space on your main hard drive (C:\). Providing it's ok, this system has many advantages:
1. Graphic settings can be different for each of the folders: as high as possible for the stories to have nice looking pictures, rather low for the tournament challenges because it's more about performance than pretty shots.
2. Age settings can be different too: Normal for dynasties/legacies, long for tournament challenges... And no risk to forget changing this whenever I switch from a "long aging" game to a "normal aging" one :-)
3. Store content: I don't need it when I play a tournament challenge for instance (besides the few EP registration sets maybe). No need to risk an over load of the RAM for my poor computer. But I've put a nice assortment of store stuff for the dynasty, because after all, if I've bought those shiny goodies, it's to use them.
To add on store stuff, there is indeed no need to re-download all you purchase each time you do a factory reset. I have created a kind of "Sims 3 stuff Library" on another hard drive and each time I buy and download something from the store, I copy its Sims3pack to this external library. Then, whenever I do a factory reset/create a new Sims 3 folder, I select the Sims3packs I want to use in my library and simply copy/paste them to the Download folder of the freshly created Sims 3 folder. And I install them through the Launcher.
4. Other content (CC, mods): For players who want to use them, doing a factory reset is also a good way to test those CC/mods before you add them to another Sims 3 folder where you have important saves you don't want to risk loosing.
5. Screenshots, saves: If you take a lot of screenshots and do a lot of "save as", it's much easier to have all the ones related to the same subject in the same folder. Again, no risk of deleting something by mistake.
So, altogether, I find this helps me a lot to have all those different "Sims 3" folders and it doesn't require much much work to set up. The only thing I have to remember is to rename them before I launch the game. Add any description to the folders I don't want to play, and remove those extra words in the name of the folder I want to be launched by the game.