I think that anyone who gets up every day and gets paid for doing something they truly and honestly enjoy doing (and would even be likely to do it without being paid... and probably already has for years prior) has the greatest job they can have. If you have that, then it isn't 'work'.
Amen, Brother.
I have the greatest job for me, or at least darned close to it. I help make it so more airplanes can fly safer, faster, and with fewer delays. I'm an engineer in air traffic control research and development.
For instance, in 2005, the US opened airspace above 29,000 feet. It used to be that aircraft could fly only at "odd" altitudes - FL290, 310, 330, etc. (FL290 means flight level 290 or 29,000 feet. FL310 is flight level 310 or 31,000 feet.) I helped get the even altitudes (FL300, 320, 340, etc.) open through a program called D-RVSM or Domestic Reduced Vertical Separation Minima. I'm only one person out of many who were involved, but some of my work showed how it would make the airspace safer and was instrumental in making it happen.
I could be a manager and make more money, but I'm an engineer. It's what I enjoy doing. I know how to solve problems and I live to do just that.
Are there better jobs for me? I can only think of two. One would be to work at Google. I think that would be a great place to be creative. The other would be to work for JPL, the Jet Propulsion Laboratory. These are the people who put probes out to other worlds. All you need to do is look at the current Mars probes - Spirit and Opportunity - and see what these people are capable of doing.