I think PhDs are an end in themselves, not a means to an end I agree completely. I advise people to only do a PhD if they'll be doing what they love. It's the

I think PhDs are an end in themselves, not a means to an end I agree completely. I advise people to only do a PhD if they'll be doing what they love. It's the one chance you get to do exactly what you want, so make it good. EDIT: one chance (apart from doing a startup).