Originally Posted by Sander
Emphasis on should
. In reality, I've never experienced that, nor has anyone I've talked to about bespoke.
Are you distinguishing between fit and style? The two aren't the same to me.
IMO, fit is limited to very basic things, such as whether the collar sits on your neck, whether the fastening button pulls, etc.
Style is about design details, including whether the jacket is short or long, body fits full or slim, shoulders extended or narrow, etc.
You can have a jacket that fits perfectly, but isn't to your liking. Maybe the shoulders aren't extended enough, or maybe they're too narrow. Or maybe you think the jacket is too short. IMO, those are better understood at stylistic details; not fit.
I expect the first commission to fit perfectly. That is, the collar should fit on the neck, etc. Whether the stylistic details are to the wearer's taste seems highly dependent on the client and tailor. Just because something needs to be shortened, or if you felt the shoulders are too narrow, doesn't mean the jacket technically doesn't fit. Just means you don't like the style.