We live in an age where negative sarcasm is considered fashion.
Frankly, I’m not far off your post: Wife, job… but I met my wife in my mid-50s, expecting to be Bachelor Uncle forever. No kids, so no one to take care of us in extreme age but I love and appreciate my wife beyond words, and now I’m 4 years from retiring to her homeland. Admittedly, it’ll be Bali, but dammit - another language to learn, moving to another part of the world, new everything to get through as an immigrant - so challenges… but also new adventures.
You got to keep moving, keep trying to be positive. On on the end-run of life, and if you’re not trying to make our short time here positive, then you’re going to regret everything along the way, so hang in there!
The things that come to my mind when thinking about answering this question are naturally pleasant things, so it's interesting that other people's answers gravitate toward cynicism.
"What keeps you going?" Flowers in the springtime, the promise of Mexican food (as someone else in this thread said), the taste of oranges.
You have to be already pretty depressed (and not trying to improve your outlook on life via positive psychology) for your immediate answers to be things like idk i just haven't killed myself yet i guess.