Currently, birding. Got really into it in 2021 since it pretty much runs in the family. I feel that observing the lives of our fellow creatures helps me really destress and put my mind off work. Interestingly, I find that birding while walking in the nature works better in this regard than just walking in the nature.
Get a good pair of binoculars, a bird sound recognition app for your mobile[1], and a bird field guide (as a European, I prefer [2]), and you're good to go.
Nice, i'm an amateur birder, meaning i'm just standing in front of the office building and ..watch the birds. But lately i have been thinking more and more about professionalizing it.
It's so calm and fascinating.
I love to spot any raptor - I'm even a little superstitious about them and tend to take sighting a hawk as a good omen. I also always love to watch a heron/crane - they just seem so dinosaur-ish. Very interesting birds.
My favorites are Corvids.