I saw an article on JobsRated.com that analyzed the 10 best jobs in the US.  In compiling this list, the researchers relied on five criteria to compare jobs as different as librarian and sheet metal worker. Those criteria: stress, physical demands, hiring outlook, compensation and work environment.  To me, these jobs do not seem fun.  I think that they need to incorporate interest level into these criteria.

1. Mathematician
Applies mathematical theories and formulas to teach or solve problems in a business, educational, or industrial climate.

2.  Actuary

Interprets statistics to determine probabilities of accidents, sickness, and death, and loss of property from theft and natural disasters.

3. Statistician
Tabulates, analyzes, and interprets the numeric results of experiments and surveys.

4. Biologist
Studies the relationship of plants and animals to their environment.

5. Software Engineer
Researches, designs, develops and maintains software systems along with hardware development for medical, scientific, and industrial purposes.

6. Computer Systems Analyst
Plans and develops computer systems for businesses and scientific institutions.

7. Historian
Analyzes and records historical information from a specific era or according to a particular area of expertise.

8. Sociologist
Studies human behavior by examining the interaction of social groups and institutions.

9. Industrial Designer
Designs and develops manufactured products.  Prepares and analyzes financial reports to assist managers in business, industry and government.