What seems weird to me is that as a wizard, I was using axes, swords, bows, shields, etc. Seemed like I could use pretty much any weapon I picked up. That was just odd.
Yeah, same for the Monk. "Generally" a Monk would use Hand2Hand (or a hand weapon) or a Bow Staff and that's about it as well light armor. With D3 I just gave my Monk "whatever". It makes having different classes seem... useless?
As "Krowen" said, "Skill trees are an illusion of choice, always have been.", then maybe classes and spells/skills are just illusions of differentiation.