I think this is, for the most part, a one or the other, no middle ground kind of question. Where do you stand?
I’m a dressing aficianado, myself. Stuffing is a barely acceptable substitute and a definite downgrade. Poll to follow.
Popcorn. Put raw popcorn in the turkey and when its ass gets blown off, you know the turkey it cooked well enough.
You might want to define how you mean the two terms. I know that some people use them interchangeably while others maintain there is a clear distinction.
How do you define the terms? In my mind, one is cooked in the bird and the other in a casserole. I can think of disadvantages to both, but I can’t think of any reason why the same product cooked inside a turkey would be a “definite downgrade”.
I prefer dressing, but only because I don’t want to cook a stuffed bird, and it’s easier.
Cornbread dressing. We never really had stuffing growing up. I think it might be a regional thing.
ETA: Cornbread dressing cooked and served separately, not inside a turkey.
No. At a big dinner there isn’t room in my stomach for all the good food and cooked, wet flavored bread goosh. Just, no.
Both.
We stuff the turkey, but also prepare at least one other pan of dressing.
I’ll also chime in that I thought they were the same thing. 
They pretty much are. We call ours “stuffing”, even though we cook it in a separate dish. Some people use them differently to cut down on confusion, I guess.
I guess I’m wishy-washy? In my family if there’s a distinction, dressing is cooked by itself and stuffing is cooked in the bird but they’re the same thing and mostly just referred to as stuffing.
I use the terms interchangeably.
It’s neither dressing nor stuffing!
It’s wadding!
Dressing and stuffing are different. This is dressing:
Yep, stuffing.
Not where I’m from. 
My family calls it stuffing, even if it’s cooked separately from the bird, but it seems to be the same thing as what other families call dressing. Or is this meant to just be a poll about what it’s called?
Where you’re from dressing is stuffing+ stuff that’s usually considered part of stuffing anyway? Curious.
Boxed stuffing mix and sugar in the cornbread? Not in any part of the South I’m familiar with.
I have always thought of dressing and stuffing as interchangeable and I’ll use stuffing to refer to it whether it spent any time in the bird or not.
I cook it in a separate pan, though. The turkey just cooks better when not stuffed full of bread, and I like the crunchy bits on the top and edges. However, I start the stuffing only after the turkey has cooked enough to give me some juice that I can put in, so I’m getting pretty much the same benefit.
As for whether I’m serving it… If you gave me only one dish at Thanksgiving, it would be stuffing. I would miss not having all of the dishes, but it would not be a difficult choice.
I am not a fan of cornbread stuffing, by the way.
Stuffing. But I’ll be danged if I eat anything that gets shoved into a bird’s ass.