We'll leave the essence of all things to you then, Jonathan ;-)
do u think that only nuts go for a phd? i have tried to do a phd, was accepted but the funding went pear-shaped at the last minute! do u consider that as a no no sign...was i lucky? i don't know because i still wasn't luck to find a job with my masters and strange things keep happening to me, like crazy delays in letters when i am short-listed for an interview! i ended up very pessimistic and not knowing where to start from? to phd or not to phd is the question...
i think it's a challenge to do one regardless of the research or job market that awaits you afterwards, but i am sure one can spend his/her life in more enjoyable ways!!!