Biden is a Scorpio, but he is very close to being a Sagittarius (only 2 days). He seems to fit personality-wise more closely with the latter.
Scorpio:
Loving
Intense
Powerful
Determined / tenacious / persevering
Emotional / sensitive
Calm but seething
Reserved / withdrawn
Secretive
Deep / profound
Passionate
Loyal / devotional
Ambitious
Extreme
Willful / fanatical
Mysterious / magnetic
Deeply resentful / brooding / potentially destructive
Sexual
Sagittarius:
witty conversationalist
freedom loving / free-spirited
idealistic / believing
moral
intelligent / intellectual
positive / optimistic
honest / sincere
reliable
enterprising / ambitious
energetic / active
versatile
adventurous
independent / unfettered
generous
temperamental
impatient / restless
Ideal Careers Ideal careers for Sagitarians include teaching,<3><4> the law,<3><4> theology and religion,<3><4> politics,<3><4> public relations or advertising,<3><4> anything related to travel,<3><4> arts, science, medicine and research
Likes travel<4> and adventure, honesty, justice and law,<4> freedom,<4> meaning,<4> intellectual compatibility, taking risks, flirting, socializing.
Dislikes routine and chores, being constrained,<4> being tied down,<4> being forced to do things, being doubted, having to explain oneself, being forced to make promises, being bothered by little details
Obama/Leo Pretty much in the center of the sign period (July 23-August 22)
Love this: Many astrologers believe that each sign of the zodiac has its own identifying physical traits. Some think of Leos as being usually tall, with thin waists, trim athletic legs, strong physical features, well-defined appendages (hands, feet, etc.). They are said to be tending to keep their head held high and look down their noses at others, and have a mane of thick hair.
Characteristics:
Creative Proud Risk-taking
Fun-loving Dramatic Dignified Theatrical
Passionate Affectionate Ardent Loyal
Loves attention Very strong Independent
Noble Leader Sunny Bright Super cool
Magnetic Kingly Powerful Enthusiastic
Protective Adoring Playful Inventive
Generous Supportive Warm Broad-minded
Expansive Faithful Warmhearted Loving
I got all this from the Wiki site and links from there.
http://en.wikipedia.org/wiki/Astrology