For those of you who may be wondering how your vitality percentage is calculated you can use the following formula:
X / 1.68 = Vitality Percentage where X is equal to number of hours in the game.
So if you want to know how much vitality percentage you will have we you get home from school or work after leaving your character in the game for 8 hours you would calculate the following: 8/1.68 = 4.76% vitality.
Remeber that your character must be in the game to increase vitality.
EDIT: As people have noted to me you don't have to be in the game for vitality to increase.
I leave my character in the game 24/7 so that I'm always earning vitality.
Enjoy!
Edited, Wed Feb 16 12:17:48 2005 by ColdChill