Shadowfootwork: Warlock Variants

I really like the warlock class from Complete Arcane. It's really what the sorcerer should have been - something flavorful, something unique, and not just an unimaginative wizard remix. While I love the gloomy, gothic flavor of the class, I wish it could have been designed to accommodate other flavors. So I'm working on some variants, and plan on using it as the basis to finish a similarly structured "superhero" class I worked on a year or so ago. But first up, the two warlock flavor variants (Gifted and Natural) and the structural variant (Strange):

The Gifted
[Gft] Blessed with celestial powers of light, the gifted are the flipside of the warlock's dark coin. Revered, feared, and even worshipped as the descendants of gods, the gifted use their amazing powers as a force of good and law.

The Natural
[Nat] While warlocks attibuted their powers to the forces of evil and the gifted to the forces of good, naturals attribute their strange abilities to the forces of nature.

The Strange
[Stg] The strange focus not on the raw power of his blasts to defeat his enemies but in skill, hardiness, perception, and varied strange powers.