Being a Rogue myself i'll try help you out.
I play on a PvE server so I can normally only BG.
Anyways. Start off the fact you are human, you have Perception and +4 skill to swords and axes (I think it's axes)
A good thing about perception is you see a rogue stealth in your sight, pop perception you will see him/her.
Duel wielding swords are quite good, if you manage to spec 5/5 swords in your combat talent tree you sometimes get an extra attack on proc.
Duel wielding ome-hand maces I never tried and I don'' know anyone that does because apparantly there are A) No good 1H maces around B) The 5/5 Mace spec hardly ever stuns, same for spec fist weapons.
Daggers on the other hand are cool. Plenty variety just like swords, only good thing with daggers is you can Ambush and Backstab, with swords you cannot do that.
Now lets look through the talent trees.
Assassination: 20 point cold blood for PvP, if you can stay alive long enough you can pop CB and Eviscerate,
or CB then Ambush
Combat: Lightning reflexes to increase dodge, Duel wield spec, Parry chance and Riposte to disarm them, maybe blade flurry if you're dealing with 2 opponents, but 31 point Adrenaline Rush can be you're I.W.I.N button
Subtelty: Premeditation if you have time on your hands, Ghostly Strike if you want, do NOT put any points into Improved Distract, it's useless as hell
Now lets go to the class you might be fighting
Warlock: Use ambush, if you stunlock their Deathcoil ability is instant and makes you run causing damage, giving them time to DOT you, if they are using their Succubus demon try kill their Succubus because they can easily Seduce, Fear, Shadowbolt, Seduce and so forth
Priest: They might have their shield up, or they won't, either way I opener with Ambush then backstab, when they heal theirselves depending on their mana you could blind and bandage, but priests melt faces so if you are PvP spec you have an ok chance, if not then try not to attack one
Mage: NEVER stunlock, they have that ability to blink and you are like: WTF? Where did they go? Then you find yourself being kited to death
Rogue: Cheapshot then Rupture, the DOT will allow them to vanish but it'll break their stealth blowing their 5-min CD after that Gouge, backstab etc. Or KS here and ther building CP's on them
Druid: Myself usualy dies of boredom before a druid actually kills me :S they might root you in place and use Fairie Fire which makes sure you can't use Vanish, so if you get Rooted Vanish before they get chance, then attack again
Hunter: Arguably our anti-class, usually they are total pussies and put hunters mark on you then run away, place a trap down, sit on it and flare etc. Try and stunlock if you can, but their darn abilities with their guns and bows are annoying, they like to rely on kiting you, more often than non they succeed.
Paladin: If you are dueling a paladin that 2/2 imp kick might help when they cast holy light, but any good-minded paladin uses HoJ then does holy light
Shaman: I would suggest taking down their totems 1st, their earthbind totems are annoying making you slow down so they can run away and kite you, use frostshock etc. Pretty tricky
Warrior: Start with a stunlock, and really pound them to hell, if you are below certain health they can use Execute to rape you, so if you are finding yourself low on health, blind and bandage. Start pounding them again
A note on stunlocks: If you are facing an Orc they have a 25% chance to resist a stun, so an Ambush wouldn't go amiss
Well that's my insite into it, remember that flash powder, poisons and blind is your friend. Good luck being a PvP king
