Types
Angel
Other than the wings and class, they have the ability to heal a person quickly and really only fight when needed.
Most compatible class; Healer. Least compatible class; Assassin.
Human
Humans have no real ability. They tend to be smart and quick-witted, and when it comes to a fight they are almost always ready to throw down.
Most compatible class; Warrior. Least compatible class; Healer.
Elf
Elves are agile and wise.  They tend to stay farther away from fights, preferring to kill their victims from a distance.
Most compatible class; Archer.  Least compatible class; Scout.
Barbarian
Barbarians are strong and fierce.  Although they have no powers to speak of, they can withstand incredible amounts of pain and have nearly no limit when it comes to stamina.
Most compatible class; Warrior.  Least compatible class; Assassin.
Werewolf
Werewolves can change into a wolf at will. They are agile and loyal, as long as they are treated right.
Most compatible class; Scout. Least compatible class; Rogue
Shapeshifter
Shapeshifters are tricky and distrusting of their surroundings. They thrive with pranks and solitude, and don't trust easily.
Most compatible class; Rogue. Least compatible class; Assassin.

Classes
Healer
Healers have the ability to heal almost anything, though not immediately.  Something like a scratch can be healed in a second, but a thing like a broken bone will take around two to three weeks.
Most compatible with; Angels and Elves.  Least compatible with; Barbarians.
Rogue
Rogues are people that work alone, doing nearly anything for money.  They'll join a party for a bit, but never a guild.
Most compatible with; Shapeshifters and Humans.  Least compatible with; Werewolves.
Warrior
Warriors are fighters at heart.  They're not one to mess with, and are great to have in a party or guild.
Most compatible with; Humans and Barbarians.  Least compatible with; Angels.
Scout
Scouts are people that move ahead, figuring things out for the party and, well, scouting things out.
Most compatible with; Werewolves and Shaleshifters.  Least compatible with; Elves.
Assassin
Assassins are people that kill others for money.  Most go by the strict code of  "only kill those that do harm to others" while the remaining few go by the less strict code of  "whoever the fuck pays more."
Most compatible with; Humans and Elves. Least compatible with; Angels.
Archer
Archers tend to stay at a distance, firing their arrows quickly and decisively.
Most compatible with; Elves and Angels. Least compatible with; Barbarians.