I have all packs as well and only a handful of kits, mostly because I’ve just always concentrated harder on making sure I have all options of gameplay and the kits just don’t always matter to me, but I will say this;
it really is going to matter more what your interests are and how you want to play your game. I think only one or two kits even have any gameplay mechanics in them, and each one is going to be either CAS stuff or build-buy stuff that won’t be all that game-changing, so it’ll come down to whether or not you’re interested in any particular kit’s theme. If you really want to build a castle for your sims to live in, or an industrial loft, or if you really like plants and greenhouses, etc. just read through their descriptions and get the ones that will benefit your game, and don’t worry about the ones that won’t.
