I already got a bundle picked out: get to work, vampires and toddler stuff.
Toddlers are very limited in what they have and wear, so the stuff pack will help with some of that. (that is a very secure decision)
I'm still not entirely sure on Vampires, i could pick strangerville (but strangerville isn't the best standout either, but in saying that get to work has aliens so extra paranormal activity from strangerville would fit right in up there, not to mention the conspiracy theorists! :D ). (Still unsure what i'm likely to pick so getting some good points of views on both would be nice to have a more informed opinion on the matter)
Get to work is a slam dunk at this point, has aliens, get to see how sims work, building of businesses. getting to see Sixam will be interesting, but then EA has always been somewhat creative with their alien planet landscaping when left to come up with something imaginative.