I think that the length has a relationship to your build. Everybody has different proportions between body length, length of legs, broadness of chest, etc. That's why custom tailoring is so desirable...thes proportions are taken into consideration. I like the look of the jackets where the hems of the body and sleeve are even but as I look at the jackets I have, the sleeves are a tad longer than the body...have to get one that's even someday.

Best

AA