Variant Sorcerer

[Faulty]

Special: The Sorcerer class may only be taken at 1st level. Once taken at first level, they are free to multiclass in and out of Sorcerer, however other characters cannot take levels in sorcerer after 1st level.

Why couldn't someone with Sorcerous talent start doing one thing and then later begin untapping their arcane potential?

and light armor. Sorcerers spells require less complicated movements due to their innate nature, as such a sorcerer does not suffer arcane spell failure to sorcerer spells when wearing light armor.

This seems more than a tad OP. Part of the trade off for the immense power arcane casters have is being an easier and weaker target.

Slow Aging (Ex): Being born with magic in the blood slows slows the aging process. Starting at 3rd level, the sorcerer divides his level by 2. This results in the number of years that must pass for him to age one year. However, in areas that negate or suppress the magic in his blood, such as an anti-magic field, the sorcerer ages normally.

This is a bit confusing. So he ages slower and slower as he gains levels? If he gains, say, 3 levels in a year, what does that amount to? It seems a bit convaluted. Maybe bump this up a few levels and have him age at quarter or half speed flat?

Enduring Magic (Ex): At 10th level the sorcerers magic gains a will to live. Whenever a spell with a duration cast by the sorcerer himself is dispelled, negated or supressed in any way, such as by entering a anti-magic field or being targeted by dispel magic, the spell continues to function for a number or rounds equal to 3 + the sorcerers charisma modifier.

This seems like a bit much for a level 10 ability. You should revise it or bump it up a few levels. A possible change:

Allow the Sorceror to make a Spellcraft check against the DC or check of the effect which negated his magic. If he succeeds, his spell effect remains for a number of rounds equal to 1 + half his CHA modifier.

Living Magic (Ex): At 20th level, the sorcerers blood is alive with magic, and the sorcerer cannot be denied his gift by any means other then death. A sorcerer who finds himself cut off from his magical energies may continue to cast spells regularly for a number of rounds equal to 3 + his charisma modifier. If the spells cast have durations that would otherwise would be dispelled, negated or suppressed in any way, Enduring Magic takes effect immediately for its duration.

I'd suggest 1 + half his CHA modifier here, as well, or at most 1d3 + half his CHA. 3 + his CHA modifier at level 20+ would be a bit much. Between gains in CHA, buffing items and spells that boost his CHA, any attempts to stop his magic would be null. When you think about it, that's unfair to, say, other casters who are neutered in anti-magic fields, or grappled fighters, or whatever.