Mainly to meet people. I do van life, so I don't actually need the couch per se, but it's good to have someone local to meet when I travel to a new place. Back when I had a couch, I enjoyed hosting people for the same reason - meeting interesting folks from all over the place.

Catching a wild bird in my hand... Making a roadtrip/adventure across the continent, exploring the wild west, on my own, for four months, despite my friends and family back home telling me to stay home and watch TV with them all summer... Tubing down a local river near my house... Looking down into the Haleakala crater in Maui... Nighttime in northern Canada, with the clearest stars I've ever seen... Hiking up the Jade Dragon Mountain... ...and more yet to come!