Sims 2 seasons is the best expansion pack for Sims 2 and let me tell you why...
In fact, now it can rain, snow and even some lightning! And this adds lots of new interactions for the Sims, for example make a snow angel in the snow, make a snowman. Creating a snow man is even influenced by the personallity of your Sim. If your Sim have a groutchy personnality, he will make it mad. If he's pacific, he'll make it happy!
There is lots of new objects, and new six carrer tracks. One of them is particularly rewarding. It's the adventurer career. One time in the carrer, it'll say that the Sim found a secret place in a mountain or something. Just choose the option where the Sims enters the cave and he'll find an idol and sell it for 15,000$ simflouz.
In top of that, your Sims can now harvest vegetables and apple trees. And if he sprays more than 100 times pesticides, he can become a plantsim which is a really good thing: only three needs which are very easy to fulfill: doesn't need to sleep and can breed on his own (with a "perfect" sim model so that it ain't a clone).
I have lots of knowledge about Sims 2 seasons since I purchased the Prima's official gameguide. It sure helps for knowing the many things in this expansion pack!
It doesn't add cars or new pets, but it sure is the one that adds the most useful stuff to the Sims 2 game. If you want to buy one Sims 2 expansion pack,it's the one to get or Bon voyage. Both are the best Sims 2 expansions in my opinion.
I didn't gave it a 10/10 rating because it isn't a full game, it's only an expansion pack.