Hi, this is a bit of a rant/whine post. I could use some good advise from a wise, experienced grown-up scientist. Please?
The situation is the following:
I'm currently writing up my PhD. I have some serious motivational issues and by now I'm at the point where it absolutely affects my work, like...badly.
I feel a little stupid about this, because I'm actually whining while sitting on a very comfortable cushion. I've done my Master's in Germany, in a fairly high-profile lab. It went quite well (I think I'm still that PI's MSc student with the most publications.

We collaborated with my present boss.). For my PhD, I went off to the UK, because I was looking for a specific kind of project, and there weren't many people doing it by the time. So now I'm sitting in an even higher profile lab, in a really well-funded institute, with a nicely running project...and I just hate my job. I'm absolutely de-motivated and I just can't be bothered with ANOTHER experiment. I know, the stuff is really important for me, but it's like having a mental block - I'm not concentrated, I can't remember anything and I really don't freaking care about the result, because it's not making a difference anyway.
There might be a few reasons for this. On the one hand side, my boss doesn't care for any publication below the level of nature, cell, genes&dev ... which makes my project feel like the immovable beast. Nothing happening anyway, no matter what I do. On the other hand, I don't get along great with my "babysitting" postdoc. He’s a nice guy, but he’s also the "yay, that's soo interesting, let's do that"-kind of person, while I'm more the "it's not going to work because if XY, but I can give it a go anyway" kind (that's a bit of an overstatement

). This could be a good combination (he's the drive, I'm the analysing critic

), but in reality, it's not. Instead of being motivating, he's initially telling me that the results are good, and then he's annoyed because I'm insecure and not enthusiastic

. That's not helping! I'd love to be more positive about this, but I'm afraid, it's not a choice you make, it's a character trait, and therefore really hard to change. Also, I can say whatever I want, he does know better anyway. E.g. We‘ve been discussion about the same issue (in different flavours) for two years now. My approach was (in 3/3 instances) the one which gave results, while his just wouldn’t work. Nevertheless, he’s still sticking to his point of view. I'm really not enjoying scientific discussions anymore. I'm his first PhD student, and I do understand that he might not now how to deal with my "issues", but he's my first PhD supervisor, and I'm not sure how deal with the situation either.
I'd also like to point out that I have not always been that way. I worked in many labs before, on medium and long term projects, and I always at liked it. So this is a new issue for me. And I'm having difficulties to handle it.
The obvious solution to my problem is "pull yourself together, and just get the job done". Indeed that worked for a while, but nowadays, this just won't cut it anymore. I'm such a whino!
If anybody has some advice/thoughts as to how the get out of this really destructive, not-motivated state of mind, I'd be grateful. Otherwise...thanks for listening