While I enjoy my 1911s, I've found that:
-They're heavy (and yes I only use steel-framed, 5" ones);
-Potentially too finicky (potential for loosening up plunger tube is a primary concern; I had it happen once and it totally tied up the gun)
-As Dagga Boy has succinctly pointed out, not the best for threat management
-Very lubrication intensive
-Require an individualized, time- and ammunition-intensive protocol to de-bug and vet
-Decent ones have a higher buy-in price compared to comparable polymer-framed guns (i.e., HK)
-They're oriented strongly towards .45 ACP; I prefer 9mm or .40, and feel that 1911s in calibers outside of .45 ACP are a bit of a work in progress (both gun- and magazine-wise)
-Not as weather/media impervious as polymer framed pistols
Consequently, nowadays they're pretty much off my radar as a duty gun, although I have 2 vetted ones that could fit the bill-my Gen 2 SIG GSR XO and Colt 70 Series stainless Repro
Best, Jon