Easy: Lightsaber. It's one or two handed and only the truely gifted (like myself :P) can weild one.. . But seriously, I like the double-edged bastard sword. Again, either one or two-handed. It's not so short that you look like a weinie on the battlefield and it's not so huge that you need two hands to weild it. Yet if you use all your strength with both hands you can deal a more devistating blow. Why I like double-edged? I don't know, just kind of...uhm, poetic justice. It seems more sword-like (as opposed to "big knife-like") if it's got two edges.