The Crimson Binome
Hero
Some games are big on allowing the player to re-fluff anything so that it looks like anything else, as long as you don't change the mechanics. As always, the GM is final arbiter on what is allowed or not.I picked the first option because I don't believe that I need to pick subpar options in order to roleplay my character or vice versa and refluffing exists for a reason. If I want to say I use a mighty waraxe but want the mechanical effects of a greatsword, I'm totally within my rights to refluff it as long as I don't change anything mechanical. I think some of the people posting in this thread are forgetting these facts. There's nothing wrong with knowing how to build mechanically the best character for what you want to achieve, nothing about doing that stops you from also roleplaying however you want or whatever else.
The way 5E is presented, though, re-fluffing isn't suggested or encouraged. In the sort of representational system as which 5E presents itself, form and function are irrevocably linked. A warhammer does more damage than a mace because, in spite of being harder to use, it's more effective at injuring an opponent to the point of incapacity. These are inherent properties which distinguish the two from each other. You can't have an axe with the stats of a greatsword, because the fact that it's an axe means it has axe stats rather than greatsword stats.