Because reloading a weapon in a first or third-person shooter game is often such a quick and common occurrence, most developers don't dedicate too much time or effort trying to make these animations stand out, often focusing more on the gunplay itself, which needs to feel responsive and snappy. The truth is though, considering how frequently a player is going to be loading a new magazine into their weapon, they're going to notice very quickly whether these animations stand out from what they're used to, or if it's just the same sequence that's already been seen hundreds of times before.