This is no good, I have not even bought my first gun and I am already getting excited to get a 1911 as my second gun.
In my case it was the first centerfire pistol I had extensive training in the operation thereof. As a result, I have a very strong bias to arched mainspring housings. Of late, almost no one arches mainsprings, and i do not know why.
Original design had a long trigger, no relief cuts on the frame just aft of the trigger opening, and a flat mainspring housing. At the request of the War Department, the model 1911A1 had a shorter trigger, milling and an arched mainspring--and that was "the 45" for about a half-century.
Let's see, my Series 70 has an arch (pachmyr, no less) the Officer's does too; as does the Norinco and the Hartford-built Argie--so a person can often find these things compulsive after a while.
My old "win the lottery' wish list (all straight-out "Please, Colt Custom Shop build me:") was 1, a set of electroless nickel with blue controls in Government, Commander, and Officers in .45acp; then 2, Same in Royal Blue but in .38super; and 3, a semi-tactical collection of Commanders and LtCdrs in .40corbon or .45super--definitely three wishes territory.
What gets carried varies. One of the best reasons for variety in one's safe, really.