Hammers are cooler than swords. Especially with heavy armor.
Like Ketheric, a fairly thin, literally undead man, not even remotely a hulk of muscle gymbro. But a combination of plate and especially the way his model holds the versatile hammer just oozes strength that no sword come close to.
Even if heavy armor generally sucks in the game, it really gives that nice living tank feeling. I wish there were more warhammers in the game with less focus on swords.