Fantasy-Iron Mary (magical war ax)

Science Fiction-Any Battle Exo-skeleton (or even the loading one from Aliens)

For full scale destruction one of the hover tanks from Hammers Slammers.

Fantasy I would say either the Ranger sword that Stridar uses before Narsil, or Narsil itself, both are extremely sweet.

Sci-Fi, what's better than a lightsaber you say? Well a double bladed lightsaber of course! So I would have to have one of those!

Well......a light saber would be nice BUT....what could you really do with it? Killing is illegal. It would be neat but since I am not a Jedi I would never be able to use it properly. Its a Jedi's weapon and face it, we ain't Jedi.
Therefore, after long consideration, since you said "Weapon" I cant pick a device used to stop time because that doesn't really fall under the weapon category. I would probably go with the weapon that Predator had attached to him which included the ability to turn invisible so I could safely rob banks and obtain an enormous amount of wealth and live an easy life.

The End

Since I'd probably inadvertantly end up sawing off a limb with the lightsaber, probably Deckard's pistol from Blade Runner, just because it's pretty nifty. :)

For sci-fi, I'd have to say Princess Leia's blaster. It did not matter where she pointed it. She pulled that trigger, and shit started dying. For fantasy, I'd have to say a vorpal sword. It was magically designed to chop off people's heads by aiming for the neck.

Rail gun... I know, I know, they are possible to make, but still a real railgun would be incredible... Eraser style ;) Including the xray scope, hehehehehe. Think of what you could do with that... the ultimate sniper's weapon.

Green Latern Ring.

Excalibur, from the movie by that name.

Also, not entirely fictional but it would be cool as heel to have Blain's minigun from Predator, if you could reasonable carry the damn thing.

Postscript: Those body mounted machinegun thingies that Vasquez and Drake in "Aliens" had were cool also.

ok.
so i´m thinking for my personal defence... i´ll choose these weapons.

one of these...
http://www.gamespy.com/bizbuzz/july02/bizbuzz25/t2s.jpg
and one of these...
http://www.repubblica.it/online/spet...200h174c00.jpg

Those would be the M56 Smart Gun.

These huge crane mounted guns are primary offensive and defensive machine. They fire the M250 series round at rapid fire speeds. They have built in IR tracking, which can be converted to movement tracking to aid in enemy location. They do, however, drastically reduce a marine's maneuverability.
They also are programmed with the profiles of the other members of the squad and will stop shooting if pointed at them.

anyone ever read Heinlein's "Tunnel in the Sky"? Much the same question of any weapon was posed, to a group of people colonizing a planet. The one that best survived, carried only two knives - equivalent of ka-bars. The rationale was that with a huge gun, the pattern you fall into is "confident, cocky, lazy, dead", whereas with only a knife, you're alert, because you constantly fear for your life.

Double headed lightsaber from Phantom Menace (So I can play Star Wars Kid, too!!)

Aragorn's sword from LOTR.

William Wallace's longsword from Braveheart (the one that gets thrown at the end of the movie).

A Warhammer mech or Battlemaster mech from Mechwarrior.

(Hey, if we're gonna dream, dream big)

Oooooo, cool, where did that info come from?

Hell yeah, Warlord Titan > *.

Mostly from Alan Dean Fosters novelization of the movie but this site has good descriptions of all the Colonial Marines weapons.

http://www.gurpsmaster.de/cmltweap.htm#m56

Fantasy: Goku's abilities, if that can count as a weapon.

Sci-Fi: klingon bird of prey.

Cant beat the lightsabre. But I still would like a batleth. Thats one of those klingong swords that worf uses in Star Trek

Sephiroth's Masamune (FFVII)

Fantasy: Green Destiny from Crouching Tiger, Hidden Dragon . Or possibly Luggage from Discworld.

SciFi: The Shoulder Mounted Cannon (with targeting gear) from Predator .

Veritas en Lux!

Jimmy The Hutt

I used to have that book but I have no idea where it got too...

M41 Pulse Rifle from Aliens

The twin pistols Ebony and Ivory from Devil May Cry (demon possesed so that they had infinite ammo)

The monofilament sword from an anime I can't remember. It was a handle with a spool of atom thick wire that had an anti gravity ball attached to the end. Pretty much it was a sword that was perfectly sharp, perfectly stiff, and could extend from an inch to 50 meters long.

I'd settle for an AWP off Counterstrike

-=It's gotta be my lightsaber=-

http://www.angelfire.com/retro/cyrus...na0kiSabre.gif

That's easy... I would like a good set of eye-teeth

hmmmm

from sci-fi it would have to be a lightsaber
from a video game it would have to be the railgun from quake 2....the one from quake 3 sucked ass too much hesitation when you fire it
the railgun from the movie eraser was pretty sweet too

Fantasy is easy: That would be Excalibur and it's scabbard. Great sword fit for a king, but with the scabbard you don't lose any blood, no matter how much you are injured.

Sci-Fi: Toss-up there between Thor's Hammer and Green Lantern's Power Ring. I have to go for the hammer though, the whole worthy thing appeals to me, plus I know I would forget to recharge the ring.

fantasy: Woundhealer from the books of swords

Sci-fi: Wolfwood's Cross//Gun

http://home.ica.net/~mordeth/compend...images/m72.jpg

these are AWESOME. Anything that can do what this does is great ion my book. The size of a small rifle/shotgun, with 2mm ammo (pellets) fired with electromagnetism at close to the speed of light.

Go Fallout 2!