I think it turned out nicely, and miraculously our marriage is still in tact. This is a Pearl Fireplace. I got the tile in Woodbridge at Floor and Decor. I was going to grout but decided it would be too difficult to remove later since there’s a significant overlap of the tile and the edges of the fireplace insert, so the tile is caulked between the spaces. I hope it makes it easier to remove later if we ever decide to change it.
It looks like it’s always been there. Now I’ve got a “big” item on every wall, which I think balances the space. Yay us.