I have a lot of single author contributions/articles (e.g. 30% of my total papers). This is uncommon in my field, medicine. The reason is that I regularly write commentaries/letters for 2 specific journals. Yet, I also have some original articles (secondary data analyses) I did on my own.
My supervisor advises against this (we have a good relationship and he is about to retire soon). He says it could suggest a "lone-wolf" attitude to others, e.g. evaluation committees. My colleague says its fine, as it demonstrates independence. May I ask your opinion about it? Should I care?
Unlike here, I am not asking about the impact on tenure, etc.