My mate Lawrie (used to use the site as "madevo4" or something like that dont think he comes on much now though) had what I would have considered a dream job, but then seeing the hours he was doing TBH it would cancel it out, and he reckoned very few people percentage wise stuck it for more than 5 years, that was doing rebuilds and race prep on old f1 cars and mclaren f1s and stuff like that.
He's even been round the ring in a long tail macca race car, so certainly some awesome perks, but I still wouldnt want it long time as a career I dont think.