I haven't fired them all, yet, but I hope to shoot them all at least once. It's a matter of finding ammo for some of them. The 1911 for example is actually a British contract model in .455 Webley Auto, which is basically unobtainium. I could just swap the barrel and mag from the 1911A1 and shoot it with .45ACP, but that's just not the same.
The pistol about the 1911A1 is a Webley & Scott Model 1910 in .38ACP. That's probably the rarest gun I own, they made fewer than 1000 of them.