One of the things I absolutely hated about playing MUDs back in high school (and understanding what I do of MMOs, this is still an issue) is the idea that there is an optimal weapon/armor piece that everyone must have. What I love about Dark Souls (at least for now) is that this doesn't seem to be codified. Yes, there are some terrific weapons that you should go out of your way to get (the Drake Sword, for example) but they have their limits (like a lack of scaling or something.) Obviously, any time there's PvP in a game, there will be psychotic number crunchers that will come up with a sort of min/max build, but it still comes down to execution and your personal playstyle.
Still, I'm kinda poking around (harharhar) for an optimal spear to work with. I have a Winged Spear +10 and Demon's Spear +2 (thanks to some trades with Snuggly the Crow for Demon titanite.) However, under the "status" screen, the "damage" for the Winged Spear +10 is 240, while the Demon's Spear is over 300. Yet, the Winged Spear consistently hits for much higher damage than the Demon's Spear, enough that it's jacking stuff in one-two hits, while the Demon's Spear is 3-4. Anybody know why that is?
What about you cats? I heart the Zweihander is kinda standard for some really solid pvp action. I've seen some folks roll into the Darkroot Forest with Gravelord swords, Chaos Swords, etc.
Doesn't just have to be weapons, either. Armor, rings, etc.