At this point, I would say to get what type of things you like and look at videos before you buy. For me personally, I love spa day. I love the whole theme of it, I love the yoga, the massage tables. It is just a nice pack. The vampires are the best in the sims series, if you like them. Outdoor retreat is alright, its not my favorite. The camping is nice, the vacation world is beautiful ... but I seldom send my sims camping since they can't hike together and all of the furniture/build items are blocky. Parenthood is a solid pack, but I find it somewhat grindy. It adds a whole new level for children/toddlers.
For the EP's, I am on the Get Together bandwagon. It is a must have, it should be in every sims game going forward. I like Get to Work for the aliens ... I like the overall look of them in this version and at times I like following my sim to work, but that does get old. Seasons ...weather, for me that is a must have.
Stuff packs ... oh boy. I have something positive to say about each and every one, except cool kitchen. That one just should be skipped. I tend to use things from Movie Hangout a lot more than I ever thought I would. Toddler/Kid room stuff is perfect for those that like family style.
MC_Command center is a must have mod. That would be my big suggestion.
