We added a fireplace! And I love love love it!!
In my and Adam's first house we had a gas fireplace and we used it everyday in the winters, once Ares was tall enough to reach the light switch he turned it on every day no matter what the season.
When we were house shopping a fireplace was first or second on my list of must-haves (tied with a large bathtub), but the house we ended up with checked every other box on Adam's list and mine except for the fireplace.
I don't promise that someday will put in a fireplace. Ideally we would have gotten one that pushed out of the house instead of coming into the house, but where Ryan put the power line to the house it would not work out. I think I'm glad about that though, because this is a real statement in the living room. And I LOVE it.
The contractor that installed it forgot to support the floor, so he has to come back to reinforce the floor joists, and the logs and the Mirrored piece in the back are on backorder, so we can't run it for a long period of time, but still.... I HAVE A FIREPLACE!! AND ITS **REALLY** NICE!!!