Meh half and half. But, I lean towars guns, they offer more variety. I mean Shotgun beats both Gravity Hammer AND Energy Sword thanks to it's fast action.
Oh, and whoever thinks the Gravity Hammer takes no skill to wield, you're VERY worng. Both the Gravity Hammer's attacks leave you with a WIDE opening. You need good timing if you want to kill someone hand to hand with that thing, since they can easily melee kill you while you're in the middle of striking. I'd rather use it as an anti vechicle weapon anyway.
I'm off to destroy Canada,they've had to good for to long...