The top and bottom will be subject to taste, but to me, the middle one is in a state of non-negotiable disarray. I don't see why the length of the jacket should vary by the formality of the occasion, to the extent where one could pull an ill-fitting jacket from a closet and vouch for its fit based on one's plans to go bowling and sake bombing that evening. To me, fit is non-negotiable, because it's the most identifiable metric in the care that one puts into dressing. The scale of formality would be measured in the refinement or texture of the fabric. At the very least, I'd be uncomfortable presenting myself with a group of people who might hold traditional opinions on tailoring, so I would always hedge towards traditional standards. There's really nothing for me to gain by toeing the line of proper jacket length. It's the exact same rationale for wearing black to a funeral. The approval of those who insist on black will be more important to retain than the relatively accommodating apathy of people who find grey suitable.