Paradox absolutely loves dlc, but they are a bit of both when it comes to them. While some definitely add a good amount of new content, a lot really are just base game stuff. But there pricing is miles better than EA, and they have a lot of sales and bundles at least on steam.
Like on a good sale you can grab an entire game with all dlc for the price of like two expansion packs.
In regards to which one I look forward to most it is a bit of a split, I look forward to Paralives a lot, I even say a bit more than Life by You, but I have a much easier time looking forward to something when I have a release date so right now Life by you probably wins, but as I said it is very even.