I usually prefer the look of fireplace inserts to stand-alone stoves, because after all who wants a big pipe going up into the wall? Hanging a picture on it isn't exactly going to hide it, and that would probably be a fire hazard anyway. But I finally stumbled across something that could improve the looks of that large piece of metal: a pipe sham.
The "botanical pipe shame" is made from wrought iron and features swirling leaves and vines. Sure, you can still see the stove pipe underneath the sham, but I do believe the overall look is an improvement.
The pipe shams are available in 6", 9", 12", 24", or 90° elbow sections, so you can piece together sections to fit your pipe just right.
Prices for sections start at $46 at Iron Accents (you'll doubtlessly need a few pieces to cover your entire pipe).