You know, if we weren't restricted heavily by what we can actually wear on what job, I guarantee you that you would see alot more unique and different styles. Being able to mix and match things not normally able to equip would be grand.
But nooooooo....
We have to kept thing drab because we'll end up hurting someone's immersion or someone's perception of what said class should wear..so...we get what we have.
Once we're able to wear what we want without a care, you'll maybe see more different looks, but until then, enjoy seeing your generic looking characters.