Favourite gun: without a shadow of a doubt, the AA-12 automatic shotgun. Stainless steel construction means it's durable and virtually maintenance free, recoil absorption mechanism aids accuracy, The 32 round drum magazine means it can outclass all conventional shotguns at both sustained firing and reload times, shred multiple targets in quick succession within it's 200 yard maximum range, scare most enemies witless, and at longer distances the frag 12 round can hit targets at 175 metres with a high explosive round, turning it into a rapid fire grenade launcher.
Favourite melee weapon: a Maul, the name of a two handed medieval war hammer. I just like making things go splat.
Favourite fictional weapon: The Ray Sphere from InFamous. I know it isn't technically a weapon, but the powers it gives you are powerful enough to wipe small armies from existance. And that's just when you activate it.
(P.S. apologies for lack of photos, Google has failed me and shall be punished accordingly.)