Ahh, what a great subject
What makes the 1911 special to me, is its place in time so to speak. It cannot and will not every fade from humans' stash of excellent handguns as long as we still use cartridge propellant forms of projectiles. It has been around since about 1909 for a reason, it works, and it works well, while being naturally ergonomic to the human hand in its own way.
I am only 22, and my favorite pistol as long I can remember has been the 1911. I remember when my dad first got one, as he couldn't really afford one up until I was about 14, he had a gen 1 or 2 glock 21 for years. And sold it just a couple months after acquiring his kimber custom 2. He was so proud of it. I think it cost him $600 at the time. Every since then, when I was able to handle his and shoot it and take it apart, I was hooked. I shot it well from the start and just was infatuated with the heft, feel in the hand, sights, trigger, accuracy, everything.
I myself started with a cz52 at about age 15 as that's all we could afford for me, loved it but ammo was hard to get. I then got a glock 20 and liked it plenty, but it just did not fit my hands well and I shot it poorly. Moved onto a S&W M&P40 and loved the ergonomics of it as well as the looks but the trigger was terrible it had to go. I was about 19 or 20 when I decided to quit playing around and get what I know deep down is my favorite, these modern striker fired "police" guns just don't do it for me. I got a Springfield loaded model .45 and will never, ever, ever sell it. I like it that much. I just got into some pretty big legal trouble (that will not effect my gun ownership status in any way) and am selling all but two guns, one being my 1911.
Sure their disassembly is a bit involved, but it isn't that complicated and with some patience and precision with a hone and file, parts can be fit and swapped fairly easily. At least to me. It is the king of automatic pistols and always will be. While plastic frames are degraded in 100 years, a greased up 1911 will be good as new, living on.
Capacity to me isn't that important, because the 1911 allows such ease of accuracy, from point blank to 75yds. I know I will make good hits with every single round from my 1911, I trust it as it has proven reliable even when neglected, or using funky ammo. It's all about the magazines.
That sums up my input on the greatest automatic pistol ever created