This is my first time trying TS3 after having played TS2.
I must say that it is a zillion times better. The sheer amount of customization options available is overwhelming.
Pets expansion is a must buy for all animal lovers. It will NOT disappoint!
Keep simming! :)
If you are going to buy a Sims 2 w/ a stuff pack, just don't buy this one. Buy an expansion instead like Late Night or Pets.
Sims 2 is a great game but Happy Holiday Pack is the least exciting pack (specially for a thousand bucks x)).
Just a heads up!