What is the purpose of Tarantino's cameos?

Just wondering what peoples opinions are on why Tarantino makes cameos in his films? Any and all opinions welcome. Thanks

Death Proof: Original Motion Picture Soundtrack

Death Proof is a rather gratuitous (and by that I mean fucking great) 1970's movie paying homage to a genre called "Grindhouse", known for their low-budgets, splatter and exploitational topics. The exploit here is "muscle cars" and "splatter".

Django Unchained: Original Motion Picture Soundtrack

This soundtrack is the answer to the question, "How do you add rap music to a Western Soundtrack without making it sound cheesy". Yes. It's an eclectic mix of Spaghetti-Western themes, cowboy-friendly folk rock .... AND ... funk, rap ... AND ... the usual assortment of sound bites. Somehow it works. Yes, the whole thing is rather listenable, entertaining, and on the same level as the other Tarantino soundtrack standouts such as Death Proof, Reservoir Dogs, and Pulp Fiction. We are definitely getting spoiled. This standard of quality soundtrack seems impossible to maintain going forward.

The Reservoir Dogs Script

The full script of Reservoir Dogs

The Jackie Brown Script

This script is by Quentin Tarantino. It is based on Elmore Leonard's novel “Rum Punch”.

The Kill Bill: Vol. 1 Script

"Revenge is a dish best served cold"
- Old Klingon Proverb -

The Death Proof Script

The text below isn't really the "script". I actually don't know what it is... maybe some sort of transcribed audio from the film. But heck, it's the best I could find in html format.

The Death Proof Trailer

This car is 100% death proof. Only to get the benefit of it, honey, you REALLY need to be sitting in my seat.

QT talks "Grindhouse" on Conan O'Brien (2007)

Quentin and Conan discuss drinking "Irish car bombs" and hanging out with beautiful women on the set of Death Proof.

The Django Unchained Script

Two years before the Civil War, Django (Jamie Foxx), a slave, finds himself accompanying an unorthodox German bounty hunter named Dr. King Schultz (Christoph Waltz) on a mission to capture the vicious Brittle brothers.

The Inglourious Basterds Script

A "QT universe" WWII story of a guerrilla-like squad of American soldiers called "The Basterds" and the French Jewish teenage girl Shosanna who find themselves behind enemy Nazi lines during the German occupation.