My peace lily proved me wrong by blooming in a dark corner. @spencer_barnes68, I see what you mean about plants surprising us with how tough they can be. It's funny how we assume we know what they need.
Oh man, I totally get this. I swore I could only kill succulents for the longest time. Then a spider plant on my dim kitchen counter just would not quit living, it even had babies. Makes you wonder what else we've written off too soon, right?