Some ideas:
Mercenary
Versatile Equipment (reduce basedamage but ignore target's resistances\immunities) [well a sword has a hilt and can do bashing damage if you want to :D]
Crafty (you can repair a small amount of your equipment's HP once per day for free)
You owe me from my last job (once per day, get more gold for a quest)
I know someone who buys this (find a suitable merchant in any town, i.E. someone who buys alchemy when there is no alchemist)
That's my booze (reduce attack/defense but become immune to mind controlling effects/increase magic resistance)
You must know where to look (get a chance to increase the money looted in a fight)
Impressing the ladies is more important (significantly reduce the money looted in combat to get more attack/damage/dodge/health)
That reminds me ... (buff your party with attack/damage or a higher chance to ignore target's resistances)
Dirty tricks (reduce targets defense/dodge and/or resistances)
I get the job done (once per battle may repeat a failed action)
Barbarian
Adrenaline rush (get a bonus to attack/damage and dodge after you where hit in battle for 1 round)
I beat their leader when I was a child (reduced chance to be attacked by random encounters)
I no talk I smash (reduce prices in a shop at the cost of the merchant's affection towards you/encounter with the guards afterwards)
In the wilds we wear no armor (if the barbarian isn't wearing bodyarmor, he get's a significant bonus on attack, dodge and elmental resistances)
Watch my Scars (intimidate Target, it can take no action for 1/2 turns)
I take you with me (gain additional attack with increased attack and damage against target that killed you)
King of the wilderness (get a chance to intimidate adjacent targets after you killed an enemy. Intimidated targets cannot attack this round)
That's no sword, THIS is a sword (get bonus attack and damage if you are wielding a twohanded weapon)
Bard (done)
already done (as the text says

)
Assassin
I stand alone (get bonus attack/defense/damage when an adjacent partyposition is free)
Assassins's do it from behind (get bonus attack/damage when target attacked another partymember this round)
I know where you bleed (reduce/ignore resistances and/or armor of target)
I can smell your fear (Assassin gets first strike)
My last target wore your uniform (lessens chance of the Assassin to be targeted this turn)
A slow death is more satisfying (get a chance to do bleeding damage over time)
I saw that coming (get a chance to counterattack after an enemy scored a critical hit on you)
I leave the minions for my friends (attack targets in the back of the enemies formation)
I can kill you unless you pay me .... (get more gold from encounters)
--- Nah I kill you anyway (target gets reduced defense/armor/dodge/resistances after it payed the assassin in the last round)
Illusionist
Why are you holding a flower? (Target does reduced attack/damage and has a chance to not attack at all)
Who's your daddy/mommy? (Target attacks an adjacent enemy)
I has no money (lessens chance of enemies attacking the illusionist)
Flashy explosions (all enemies in an estimated area get reduced attack/damage/dodge)
My friend here is just your imagination (reduces chances to attack friendly target)
He was it (increases chance to attack friendly target)
We do not taste good (reduces chances of the group to get involved in random encounters)
This coin is especially shiny (reduce merchant's prices a bit)
Hallucination (Gives the Party a chance to retreat from battle)
Warlock
My master demands a sacrifice (increase mana/damage at the cost of an allies HP)
My master will eat your soul (grants a chance that target will not attack this turn)
Cursed blood (Warlock get's a resistance/Immunity to poison or some sort of magic)
Weird brew (increase Mana, Spellpower and reduce target's resistance but get more damage for X rounds afterwards)
I demand your service minion (revive friendly target in battle)
Aura of arcane prowess (adjacent enemies get reduced attack/damage/dodge)
Lifechannel (get a chance to steal X life from a target and transfer this to yourself or adjancent friendly target)