The AI is very important! The personalities are what keep me with TS2.
What I really want to know, though, is 1. Will it work correctly on a Mac? (TS3 doesn't, really.) 2. Will it work without tons of community patches? and 3. Can you back it up to disk and reinstall whenever you want without Origin after that first time? (I've had to reinstall several times.)
I won't be an early adopter of this, because I want to see how it shakes out. But if things shake out positively, I might consider switching.
Sims and CAS are Pretty, but I want more on the Building End of the game. What is EA doing to make the Build and Buy Mode better and more useable and functional? As far as I feel, TS2 and TS3 Builders seem to have gotten shafted with incomplete sets, not enough to build decent homes and a Garden catalogue that was not the best or in the least bit logical. It would be nice if EA could complete sets, or have a style for some of the stuff there and I was saying how it would be a cool thing to have something with windows like with the Modular stairs in TS3 where you can slide to determine how many tiles said window will cover (It would be as simple as taking the single tile mesh and repeating it as many times as possible (same way with Modular stairs). It would be very cool too if we could determine the size of the plants rather than random sized plants (That annoyed me with TS3 because every single time I needed a small, I got a Effing huge bush).
I also am wondering if TS4 will finally allow more ability to get creative in building sans cheating. I mean, Half landing stairs, Curved stairs, Split leveling, Escelators. I really hope that EA balances out the Features in a way that both Builders and StoryTellers/Players have enough and can really do more in the game That wil make it easier for those who play EA match games or No CC to enjoy, but also satisfy those who want CC. I also really hope that world creation is a lot easier and that EA learns from their problems and tries to incorporate Certain things from the Past games like OFB style businesses and AL style apartments.
It would also be cool if EA Released a Official styled AGS system with the games where you can create profiles within the launcher that allows loading of chosen EP/SP
From the preview pics I just saw on tumblr, they do look pretty cute and cartoony which I like! There's a new life stage too - Young Elders - bringing it to 7 life stages total. And different species right in the basegame apparently - witches, vampires, and zombies (ick). And middle names. And a HEIGHT slider! The face/body sliders look great too. Looks like you pull on the actual face/body part rather than just sliding sliders.
I.... I think I'm getting excited. Dang. I didn't want to be excited. Gotta remember that these previews may not be accurate and even if they are, things can change between now and release.