1. Our dream jobs
When we were small children we wanted to be vets, hairdressers or pop singers.
Usually children want to be popular and famous.

2. Our current dream jobs
Now there are some of us who want to be dress designers, interior decorators, actors or actresses. 

3. Dream jobs of the future
We think in the future more and more people want to work on reducing global warming or on improving and producing alternative sources of energy.
And of course travelling in space becomes more and more popular, so jobs with space travel agencies and in connection with space tourism will be very popular.