Warr2098, please change the title of your tread so everyone can see and understand what your question is about.
You should check first impressions treads on boards related to EP's you don't have.
This tread is also a great source of informations related to your question.
This is not the first time someone wanted the advice about this issue. It is a choice based on your personal preference in the game - if you like animals get Pets, if you like LN you should probably go for Showtime (I don't have it so I'm not shore) and if you like multigenerational aspect of the game and social interactions - go for Generations. Stuff Packs are great for builders but if you're not playing it that much than focus on EP's.