User blog comment:Madness v2/Best Two Handed Weapon Type/@comment-4583616-20120105201942

As some other people have said, I would advocate using the battleaxe if you're not sure. While you play with it, if you find yourself thinking, "Man, I wish I did more damage." or, "These swings are way too fast, I need to slow them down!" then switch to a warhammer. And vice versa for the greatsword. Or, you could stay with the battleaxe if it's to your liking.