for monk:
Hidden Fist - (lasts X amount of second) - anytime the monk takes melee damage during the duration, they inflict 2-3 damage back
Meditate - regenerates one's health, mana, and hunger while remaining still
Dragon Kick - in addition to damage, causes the target to burn and fly back
Typhoon Punch - hit the enemy so hard that they feel like they're in water (spawns a puddle of water with damage)
Surgeon's Hand - hit the enemy with precision on a point of vulnerability, causing them pain over time
Pressure Point - temporarily paralyze the target
Paci-fist - all damage done to the monk while this ability is activated is added up, multiplied by 1.5, and dealt with their next punch. (the longer you dont attack, the more damage buildup you get, but the closer to dying u get too)
Drunken Monkey - Slap the enemy silly (confuse)
chi blast - no or low damage, but strong knockback and slow effect to target (ranged)
ki shield - absorbs X amount of damage
Selfless Disciple - monk's damage is reduced by half. All damage recieved by the monk from enemies during X duration is divided in half and given as healing to the monk and her allies in Y distance
pin down - lets the monk jump on top of other players for X duration
Repulse the Monkey - ranged push (cone), knocking enemies in front of the monk back 4-5 squares but does no damage
inner peace - dodge all melee attacks for X seconds
edit:
Knuckle Sandwich - deals damage and takes away 2 food from enemy's hunger meter
Love tap - reduces monk's damage by half, but all damage dealt is returned to the monk as healing
inner focus - the monk ignores their nerves, taking reduced damage from all sources for the duration
Fists of steel - allows the monk to dig out a block exactly how it is. (when used on diamond ore, recieves diamond ore instead of diamond)
obviously i dont expect all to be implemented, or any for that matter. Was just comming up with ideas to make a monk-feel character. Highlighted ones are the ones i liked the most and felt they were unique or greatly desired.