Hmmmm heres a summary of what each class does best

:
Physician: The Physician is a healer/support class and can find partys easily as potions costs hella load.
Warrior: Like in each game they fight.
Assassin: I guess you can call this class the speedy one. It can run away in times of danger easily.
Hunter: Hmmm I would call this class a merchant more type of class since it can make cash easily.
Overall if you like money pick Hunter. If you like being support pick physician. If you like to fight pick warrior and if you like to run away from PKers and in times of need pick Assassin. I picked Hunter since I like to catch stuffs and probably give them for free

. Well best of lucks to you in picking your class.