This is going to sound awful but I'll post it anyway. Freedom. DH has about a week to live. Right now he's in our master BR in a hospital bed, trying weakly to get out of it even though I've given him a dose of Halperidol. He's been on a steady decline from acute myeloid leukemia for the last 2 months but I'm starting to realize that the polycythemia that preceded it has put increasing amounts of responsibility on my shoulders over the last 3 years or so, and has also placed some limits on our travel- no conditions too hot or too cold for him, no extensive walking, occasionally scrambling to refill a forgotten prescription or seek care far from home. (He has been perfectly fine with me going off on side expeditions too strenuous for him while he relaxes in the hotel, because he's that kind of guy.) I still can't think of any other person with whom I'd have wanted to share all the wonderful trips we've made together over the last 18 years.
In April I'm taking an UnCruise to Panama and Costa Rica by myself. I'm going to bake in the sun, snorkel among tropical fish and look for monkeys in the rain forest. Thoughts of that keep me going.