The 5 Dimensions of Brand Personality by Jennifer Aaker
The Brand Personality Dimensions of Jennifer Aaker (Journal of Marketing Research, 8/97, pp 347-356) is a framework to describe and measure the “personality” of a brand in five core dimensions, each divided into a set of facets. It is a model to describe the profile of a brand by using an analogy with a human being. I believe that it's imperitive that a brand be carefully "humanized" in order to connect with the audience.
Here's what Ms. Aaker, and her father before her, researched:

THE FIVE CORE DIMENSIONS AND THEIR FACETS
These are:
- Sincerity (down-to-earth, honest, wholesome, cheerful)
- Excitement (daring, spirited, imaginative, up-to-date)
- Competence (reliable, intelligent, successful)
- Sophistication (upper class, charming)
- Ruggedness (outdoorsy, tough)
Each facet is in turn measured by a set of traits. The trait measurements are done using a five point scale (1 = not at all descriptive, 5 = extremely descriptive) rating the extent to which each trait describes the specific brand.
AN EXPLANATION OF THE TRAITS BELONGING TO EACH OF THE FACETS
These traits are:
- Down-to-earth
- Down to earth,
- Family-oriented,
- Small-town
- Honest
- Honest
- Sincere
- Real
- Wholesome
- Wholesome
- Original
- Cheerful
- Cheerful
- Sentimental
- Friendly
- Daring
- Daring
- Trendy
- Exciting
- Spirited
- Spirited
- Cool
- Young
- Imaginative
- Imaginative
- Unique
- Up to date
- Up to date
- Independent
- Contemporary
- Reliable
- Reliable
- Hard working
- Secure
- Intelligent
- Intelligent
- Technical
- Corporate
- Successful
- Successful
- Leader
- Confident
- Upper class
- Upper class
- Glamorous
- Good looking
- Charming
- Charming
- Feminine
- Smooth
- Outdoorsy
- Outdoorsy
- Masculine
- Western
- Tough
- Tough
- Rugged