Personally, I'm all about the energy sword. I'll use Gravity Hammers, especially if I have a Grinder, but I love swords. Quick, nimble, deadly, and to the point, and that's not including the Prophets Bane. I'll use it in Super Fiesta (One does not Simply throw away a Prophets Bane in Super Fiesta) but in regularity, I'm more prone to pick up a Vorpal Talon than a Hammer.
What about you?
depends on the situation, if fighting a massive group of weak AIs such as grunts or crawlers, then the hammer for sure, but if going against larger targets, such as spartans and elites, I go with the sword
EDIT: I cant believe that this post is still trending after 2 months, and that I'm on one of the first few pages :)