I wonder how much difference 90 degrees at beginning of press matters also?Long and medium "feel" better to me personally, in the feelsies category of handling a gun, but the longer a trigger is, the more you generally start seeing people send their shots left and low-left, especially when shooting at speed (for a right-handed shooter, they go right for a lefty).
My take on it, is that it's mostly an issue of geometry, between how the trigger-finger is oriented with the trigger - ideal orientation is 90-degrees at break. Slightly longer triggers have the pad of the finger pressing a bit more on the shooter's strong-side of the trigger, and a bit less on the weak-side - leading to a press that's not actually straight back to the nose. It's something that can be controlled for a bit in concentrated slow-fire, but when you speed things up and go fast, it tends to show up more.
I also suspect a short trigger makes things a bit more forgiving with your strong-hand grip when your trigger-finger isn't perfectly isolated from the rest of the muscles in your hand.
Overall though, shorter triggers tend to tighten groups up better, especially at speed. Best thing is to experiment and give it a hard go for a couple of cases of ammo.
My CZ (known for long triggers and many comp guys swap them out) is too long for me at the beginning of the DA pull, which makes for awkward shooting. It's fine when it resets to SA.
My Tisas 1911 is also just a little too long. But my Bul 1911 comes with a short trigger from factory, and I can get onto it immediately - don't have to think about it / don't get distracted by it. Makes a massive difference.