Studying at the University of Zurich or any other re-known university is a huge privilege as you meet experts in each research area offering you deep insights in a broad range of topics. Such an inspiring environment is seldom and precious - so enjoy and appreciate the time, stay curious and get involved in the community.
Of course, I can use some models and theoretical knowledge in my current job. However, what helps me most is the way of approaching new topics. The analytical way of working learned during your doctorate is helpful to quickly acquire new knowledge and to prepare presentations in a structured way, thus you are ready to discuss with employees, managers, works councils or board members.
It is hard to say which experience was most memorable but I enjoyed most the trips together with the chair to different research conferences all over the globe.