I like wings on non-winged species, personally. Of course it doesn't make sense but neither does an animal-person standing upright, with fully formed tails, with digitgrade legs, talking in normal human speech with a different mouth, teeth and throat, often with unnatural coat colors or patterns. Suspension of disbelief is required to enjoy most of people's art or fursonas anyway, so in my perspective wings are just another part of that.
My only beef besides the usual sparkley Mary Sue types are wings depicted as fully functional even if they're "chibi" or otherwise very small or have little feathers/wingsail. Yes, the furry with larger wings would not have the breastbone to support themselves in the air either, but at least it looks believable damnit.