I live in Germany. I've just recently finished my M. Sc. in computer science and I'm now thinking about pursuing a PhD. I've been offered a full-time position on a topic which I'm quite interested in (related to my Master thesis). The contract would be for five years and well-paid, so I wouldn't have to worry about finances. But I am still very hesitant to accept, since I'm not sure if I can handle the stress associated with a PhD. Driven by fascination and harsh self-criticism, my studies went quite well and I've always received positive feedback on my performance. But I took much longer than average to finish and by the end I was close to a burnout.
I'd like to continue research on the topic of my thesis, but I'm not really interested in another academic title. I believe this is a great opportunity, but I'm also aware that I need to consider my well-being after exposing myself to way too much stress during my studies. I'm currently thinking about negotiating the contract from 40 hours down to 35 hours a week. An hour a day might make a significant difference in terms of stress. However, this obviously means there would be less time to develop, implement and test research ideas. Is thinking about work-life balance in a PhD a good idea? Or is it a sign that I'm not fit enough and I should go to the industry straight (where I know I'll end up in the long term, anyway)?