I suppose I bought Strangerville with that intent. I played through the story once, which was kind of a waste of time, but I like the neighborhood fairly well, and I use the clothes all the time. So no regrets there. I'm still not sure whether I regret buying the Star Wars pack. On the one hand, I got in on sale, so for that small amount of money I guess I'll eventually probably use enough of the CAS and objects to make it worthwhile. But I got about half an hour into the storyline and was so bored that I stopped playing and never went back. I mean, to that storyline, and to the whole game for a few months. I thought at least I'd have the nostalgia factor, as I grew up on SW, but it's just not doing it for me.
I think with all the other packs I have used the features pretty extensively, at one point or another. For example, I didn't think I would be that into the fame system, and I do have it turned off for most of my sims, but every now and then I like to play one of the handful of actors that I made (and a couple of singers, although I'm mostly waiting on those to see if they ever do more with bands). I also sometimes like to make my writers and painters famous. I've never actually gotten around to owning a restaurant, although I always intended to, but I take my sims out to eat all the time.
I play rotationally, but not with a set schedule (and with aging turned off), so it really just depends on which household I want to jump into based on my mood.
As for Eco Living, I sometimes bother with the NAPS and sometimes don't, depending on whether there's anything that fits a given sim and their neighbors. It's not too hard to slot in a few of the innocuous ones and then forget about it, though. I actually really love the community centers, although I really, really wish they would add a cheat code to change the type, as I desperately want to put in a farmer's market on the island in Brindleton Bay. I already built one there, and put a lot of effort into designing that version of the building (which looks so cute!), before I realized you couldn't change over. And I've been too lazy to go back and recreate all those changes in the generic version. :D
