Well, isn't this the question everyone asks themselves more and more the closer the final submission date comes?
And why is it that we ask ourselves this question over and over again particularly at times when we should just be concentrating and producing something, e.g. another chapter or so...? The answer to the latter is 'procrastination'. Because we want to escape the stress of the task itself.

But it is also true that doing a PhD can be bad for many of the following:
1. your health
2. social life
3. relationships
4. common sense
5. pets
6. nutrition
7. ........

If we had known all this before we started then we would have never wanted to the phd in the first place. but at the time it seemed like a great idea.

Essentially we are fighting just with ourselves!!! So we pretend at times that we have forgotten the reason why....?

Just a line of thoughts. Though, trust that it will all be worth it in the end and all the stress will be forgotten.

Hi Jo,

I see the problem. While it can be excellent to have an eager and highly motivate supervisor, it can also be difficult particularly in the final stages.

Always remember that
1. you are the boss
2. you are the only one who really knows what you are doing
3. you need to understand what you are doing and why you are doing it.
4. your supervisor is not the one examining the PhD (if you are in the UK)! and has therefore no say in whether you will pass or not.
5. the examiners will see your phd from a totally new point of view and will have no idea of your supervisors input or behaviour; they only know that this is your work and you need to defend it and explain your reasoning behind it. In the end you will be alone so make sure it's all sound!

Just my two cents. Don't know if it helps.