My favorite feeling of all is the feeling of a hull beneath me leaving the dock or sliding off of the bottom headed for deeper water. Canoes, kayaks, my flat bottom jet sled, a sailboat, all the same. That first feeling of being carried on top of the water by a craft of any kind always makes me forget about the things that I am usually preoccupied with and replace them with a sense of adventure and a feeling of confidence in the face of uncertainty. A ride in a boat is my cob web clearer, and I come home ABLE to be comfortable, but not guaranteed of a long term sense of comfort thats automatic.
there are lots of names for sea sickness. I like the official US airforce referance, they call it "stomache consciousness". That makes sense for me, I have never been sick at sea unless I had absolutely nothing to do like when I was a pampered fisherman out with a guide and his deck hands just sitting and drinking free coffee and watching my rod tip and thinking about my stomache and it's contents.
PTSD is kind of like that, you could call it "trauma awareness". Anything that involves me in deep multi-sensory ways like running a jet sled in shallow fast water with wind in my eyes and 115 horsepower in my left hand and all my senses concentrating on keeping the seperation between my boat and the rocks, thats the kind of stuff that keeps me from being "trauma aware".
thats not warm and fuzzy, thats not comfortable, but it is at least NOT being uncomfortable and obsessing on my problems and PTSD, and that is the open door that comfort will sometimes enter through.