I'm pretty content with Sims 4. The only thing really "missing" for me is the ability to create my own towns. Then it would definitely edge out Sims 2 as my favorite, they're tied right now. Without the ability to create my own town, my playstyle is rather hampered, to be honest. I love large, sprawling families that are all related, blah blah blah - and while it can be done, it's just more awkward than it needs to be.
Sims 1 was fun and goofy, loved it! Sims 3 I skipped. Sims 2 and Sims 4 is where my heart is now lol. I would, however, like to see some other Sims staples return, but if they don't, it still won't ruin the experience for me. I do try not to compare the Sims versions since they are their own standalone game. I just take what I can get lol. I didn't start playing really until a year or so ago, after the toddler update - and I have over 4k hours in this one game alone!