According to makers of motivational posters, the secret to a fulfilling career is to do something you love. This is great advice if you enjoy starving to death in a ditch, but not all that useful for the rest of us.
On the other hand, you’ll probably stand a (marginally) better chance of finding that dream job, if you actually know what you like. Take this dude, for example:
He has a simple, straightforward (albeit ambitious) goal. Fortunately, that annoying law against killing people is more of a guideline here in South Africa, so no worries there.
Consequently, if he applies himself, he could probably manage it in about five years. Assuming, of course, that he is able to secure some kind of sponsorship for his genocidal rampage AND if nobody fights back, runs away or hides.
However, his biggest obstacle will be staving off boredom. Repetitive tasks really do become deathly dull after a while.