"There are pros and cons to all of these systems. The worst arguments I have ever seen for uniformity, and the ones that prove that the command personnel need to be fired, are the concept of ammo/magazine exchange* (you waste all your ammo and expect me to give you mine? Hah!), or parade ground appearance silliness with the goal of every officer looking the same. I don't object to the honor guard looking the same - that's a goal of its own, but has nothing to do with being the police and doing the work. Shiny gear, Class A style uniforms and hats are clownshoes. My experience is that there is an inverse correlation between the appearance fetish of an agency and its core proficiency and integrity."
To me, the worst example of "uniformity" was the Illinois State Police and their M39 S&Ws. The handguns were OK, but all of their troopers were required to carry them in cross draw flap holsters on the left side of the Sam Browne belt, EVEN THE LEFT HANDED TROOPERS!!!