It's strange. In my 20s I don't have any problems hopping on a plane to explore a country all by my lonesome self. I used to like to park myself somewhere with a good cup of coffee and a good book and while away time reading and people watching. Or visiting places of interests myself or joining local tours. I enjoy random conversations with the locals there.
But now, whenever DH travels and asks me go tag along, will resist as I no longer fancy being by myself in a foreign country. I no longer enjoy random conversations with locals like I used to. I have become quite gu pi.