How do you feel about undo's?
In one of my recent games, I played a big mistake. But, my opponent responded to my move, which was also a mistake, so it worked out, and I captured their entire group.
However, a few seconds later, they requested an undo for their move, which I accepted. It went from having their stones captured, to having my stones captured instead.
I generally accept all undo requests as I want to face the strongest moves, but I would never ask for an undo myself. When I learned the game, it was accepted that once you played a move, you couldn't take it back. And, I suppose it has something to do with pride, as well.
I'm wondering if people feel differently about undo's depending on how they learned the game or what the Go culture is like in their part of the world. For reference, this player was not from a western country, and I learned how to play in the United States.