It all depends on the person. Here's my personal list.
1:Late Night
2:Pets
3:Generations
4:Ambitions
5:World Adventures
Sims 2 by far is the best. But Sims 3 looks very promising.
gamestop get sims 3 best sims out there
i found the original sims 3 is the best. the one with a bunch of faces of sims on the front. i have it now. it is great!
SIMS 3 Is the best.
Toshiba
TARGET, BEST BUY, Walmart, & GameStop
not yet. but as there have been a Sims Pets and a Sims 2 Pets, there will most likely be a Sims 3 Pets in a future. I am not an employee of EA Games, that is only my best guess.
The best Sims game is the second one but Sims 3 is coming out in 2009, March and that will be even better!!!
I don't think you can, but they can move in with you if you are partners or best friends.
Dance
Pets.
Best-Buy