This has been a busy week: I examined one PhD, collected the thesis for another PhD examination, had a meeting with one of my PhD students, reviewed one application for a research council and another one for our internal university proceedings, and responded to a review request from a journal. All of this reflects a gradual change I have seen in my career: while previously I spent most of my non-teaching time on research, now it’s often reviewing the work of others.
Is this a problem? On the one hand, one may argue that such reviews can also shift research in a particular direction - and, as it concerns the work of more than one person, it may actually have a wider impact than 'just' doing one's own research. On the other hand, it has been found that Big Breakthroughs Come in Your Late 30s. That’s still my age range: thus, as long as I still can, let's go back to my own research now!