Just found an interesting fact:
There is a linear correlation between a starting character's Mind and his MP, and his VIT and HP. Tested with 4 races and 1 Job so far. Birthdate and Guardian do not seem to have an influence.
Examples: HP/MP VIT/MND
Seewolf: 355/333 18/16
Duskwight: 312/323 14/15
Forester: 301/294 13/12
Dunesfolk: well, guess. It's peretty linear, so it shouldn't be hart to figure out.