Oooh! I hope gryffin pops in. She is Forum Queen of Longer Toppers.
Love these toppers on you, especially 1 and 3 and 6.
Are these outdoor or indoor coats/ jackets?
As others have said, the lovely Janet also rocks a long jacket/ topper, and so does tall and beautiful Sveta.
I consider longer indoor toppers a bit difficult to wear, and risky to buy. Partly that's a matter of practicality, because I have to layer them under heavier weight coats for a large part of the year. That said, I do have an almost knee length cardigan that I enjoy wearing a lot. So much so that I become frustrated when I have to remove it if going out, because it dangles from beneath my puffer coat.
I also love a longer coat (i.e. outdoor topper). Practical and good looking!
I have never really bothered to figure out the measurements that work for me best. I think it is a question of proportion so what works for one will not work for another. I know that gryffin and I are nearly the same height/ size. (And, coincidentally, we're both about your height -- 5'4"!!)
Yet she is flattered by a longer topper, and feels her best in one (as you do) -- while I find longer jackets somewhat less flattering on me than a short (high hip length) jacket. I am pretty sure that's because my legs are on the short side for my height. Only slightly -- but enough to make me feel a bit self conscious about lengthening my torso visually.
Some of it depends on the jacket, too. Unconstructed jackets are the worst for me -- I have some bad memories of myself in longer 80s toppers. Oy!
Having said that, in theory I love the proportion of long over short or long over lean, especially with tailored pieces, and I would like to experiment with it more in future, perhaps. The only thing is, I would always need to wear a bit of a heel to carry it off.