FYI - I go ALL OUT when profiling/interviewing my characters. Here is the template I use. I know its pretty extensive. This would only be useful for those who really want to get to know their characters in-depth.

CHARACTER INTERVIEW / PROFILE

Name:

Background
Birthday:
Place of birth:
Parents:
What was important to the people who raised him:
Siblings:
Economic/social status growing up:
Ethnic background:
Places lived:
Current address and phone number:
Education:
Favorite subject in school:
Special training:
Jobs:
Salary:
Travel:

Friends:
How do people view this character:
Lives with:
Fights with:
Spends time with:
Wishes to spend time with:
Who depends on him and why:
What people does he most admire:
Enemies:
Dating, marriage:
Children:
Relationship with God:

Overall outlook on life:
Does this character like himself:
What, if anything, would he like to change about his life:
What personal demons haunt him:
Is he lying to himself about something:
Optimistic/pessimistic:
Real/feigned:
Morality level:
Confidence level:
Typical day:

Physical appearance
Body type:
Posture:
Head shape:
Eyes:
Nose:
Mouth:
Hair:
Skin:
Tattoos/piercings/scars:
Voice:
What people notice first:
Clothing:
How would he describe himself:
Health/disabilities/handicaps:

Characteristics
Personality type (choleric, sanguine, phlegmatic, melancholy):
Strongest/weakest character traits:
How can the flip side of his strong point be a weakness:
How much self-control and self-discipline does he have:
What makes him irrationally angry:
What makes him cry:
Fears:
Talents:
What people like best about him:

Interests and favorites
Political leaning:
Collections:
Food, drink:
Music:
Books:
Movies:
Sports, recreation:
Did he play in school:
Color:
Best way to spend a weekend:
A great gift for this person:
Pets:
Vehicles:
What large possessions does he own (car, home, furnishings, boat, etc.)
and which does he like best:

Typical expressions
When happy:
When angry:
When frustrated:
When sad:

Idiosyncrasies:
Laughs or jeers at:
Ways to cheer up this person:
Ways to annoy this person:
Hopes and dreams:
How does he see himself accomplishing these dreams:
What’s the worst thing he’s ever done to someone and why:
Greatest success:
Biggest trauma:
Most embarrassing thing that ever happened to him:
What does he care about most in the world:
Does he have a secret:
If he could do one thing and succeed at it, what would it be:
He is the kind of person who:
What do you love most about this character:
Why will the reader sympathize with this person right away:
How is the character ordinary or extraordinary:
How is his situation ordinary or extraordinary:

Core Need:
Corresponding psychological maneuver (delusions, obsessions,
compulsions, addictions, denials, hysterical ailments, hypochondria, illnesses,
behaviors harming the self, behavior harming others, manias, and phobias):
Anecdote (defining moment):
History: