I have about hit the 200 sim limit for playable sims so I'll probably need to make some choices about my top 200. Now, I have numerous sims that I've made or played with interacting with each other. This meant I had many saves and would end up abandoning them. I actually was irritated by story progression in TS3 and as a result found that I could really only play one household per save.
I essentially make my own story progression which I like doing. Yes, I don't need mods to enjoy the game.I play without mods.