Gender
Your character's gender directly impacts your attributes. Overall, however, the genders are equivalent in attributes.
Personality (pending)
This will be based upon the Myers-Briggs personality profile, or a design of my own with the same concept. It will help guide the player to act out his character's thoughts and emotions with consistency, but will have no hard mechanics associated with them, i.e. there will be no numerical benefits or penalties.
For example, I am an INTP (Introverted, Intuitive, Thinking, Perceiving). If I played a similar character:
1. He would prefer to do things on his own, and chooses a profession that allows autonomy and little social interaction, such as an Operative (assassination) or a Technology Hunter.
2. He would derive information utilizing non-linear, associative methods. He would excel in the Internal Arts discipline.
3. If he develops any skills in the social discipline, he would probably prefer either manipulative (e.g. via deceit) or interpretive forms ("what are his intentions?") over the persuasive forms.
4. He has few convictions. He is unlikely to choose a soldier or policing profession.
Philosophical Profile (pending)
Players develop their character's philosophical makeup by choosing values that the character strongly represents.
1. Gravity / Freedom
2. Conviction / Agnostic
3. Principles / Survival
4. Compassionate / Stoic
5. Optimistic / Pessimistic
Characters are not necessarily one or the other for each dichotomy, but will adjust the ratio accordingly, such as 60% Gravity / 40% Freedom. Anyone who has 100% of any is likely to be extremely annoying!
Example (Buddhist):
1. 50% Gravity / 50% Freedom
2. 20% Conviction / 80% Agnostic
3. 85% Principles / 15% Survival
4. 90% Compassionate / 10% Stoic
5. 40% Optimistic / 60% Pessimistic
On a side note, I suppose it would be interesting for characters who succeed a social skill check to force the GM to reveal an NPC's profile, or at least parts of it, to the player.
Continua
I really like what you're doing here with both the psych and philosophy. I've studied fairly extensively the MBTI and I think you have an interesting grasp, but there's a lot more to this than the letter ratings. Two other factors you have to consider are: How introverted/extroverted are they? and how much are they willing to flex their personality to fit into a group? Mechanics-wise I feel like the personality type should play into most non-physical skill checks, and the more you are on one side, the more able you are to analyze things in those terms, and the weaker you are at analyzing it in anyone else's. That's where I see the strong suit of continua is in RPGs, in order to become better in one area, you inherently have to sacrifice in another. Now, if you want to ignore the entire continuum thing (because I face the fact that you're more talking about character development than core mechanics) you might like to take a look at the Kiersey Temperment Sorter, and the Jungian archetype model. Both of these I think could be interestingly implemented into an RPG system (in fact, I'm trying). Anyways, good luck and I hope I've helped at least a little as opposed to mindless babbling.