Are you an eternal pessimist?
Do you always look on the bright side or life or does a dark cloud perpetually follow you around? According to new research, it's down to our DNA.
Scientists have found that people who have inherited two copies of the gene which controls the feel-good chemical serotonin are likely to have an optimistic outlook on life.
Take this fun test to see if you are the type to see a glass as half empty or half full!
Search the web
What's your parenting style?
Are you obsessed with diet and fitness?
Which type of couple are you?
Are you a gender typical bloke? 
Is your child a game addict?
Are you an eternal pessimist?
Working it out: The job satisfaction quiz
How insecure are you?
Are you ready for a fresh start?
What kind of sneeze do you have?
Why a daily bottle of wine could beat heart disease
New study proves that money can buy you love
The top 20 family arguments revealed
Simple steps to beat the burglar
Drop a dress size in time for Christmas!
The top 20 UK beer brands show a return to ale
The darker meaning of your common health woes!