Would a world of perfectly predictable partners actually lead to long-term human fulfillment?

I find myself always turning to your site, reading endlessly what you've written during my absence. Tell me, is it other people's sorrow that makes sense to you and does it motivate your writings?
Seasoned life can get pretty intense, and I’ve learned that happiness isn’t just about achieving big things. What’s one simple thing that genuinely makes you happy, even on your toughest days?