The DNA results are in...and I am proud to say I am an ...

 AMERICAN STAFFORDSHIRE TERRIER MIX

(No one in the pool guessed correctly; 
Kyla is the declared winner because she said I was a "mix.")

If you check out Wikipedia you will see my picture there and below. This looks just like me! I can't see the paws but the rest of this fine looking canine resembles me. 

The purebred dog breed signature matches included in the analysis are those that were detected in the last three generations of my ancestry.

Amstaff (picture taken from Wikipedia)

From my report: 

The American Staffordshire Terrier can trace its roots all the way back to the nineteenth century in England. The English Staffordshire Terrier was created when various terriers were crossed with the Bulldog. The crossbreeding resulted in the active and powerful breed that came to the attention of the United States public in 1870. American breeders then focused their attention and efforts to increasing the size and weight of the American Staffordshire Terrier.

These breeding efforts resulted in a Staffordshire Terrier that was recognized as a separate breed by the American Kennel Club in 1936. In 1972, the current name of “American Staffordshire Terrier” was adopted. The American Staffordshire Terrier was once used primarily for fighting. That practice, however, was banned in the early 1900’s and two separate variations of the breed were gradually developed.

The American Staffordshire Terrier can be any color, with solid, particolor, or patched black, brown, tan, brindle (black and brown striped), liver, red or fawn. Black or blue mask, brindle or tan points are commonly seen traits in this breed. Ears may also appear different due to cropping.