My problem is that when I'm high on joy, I don't notice details that another monger might care about. I found that I need a checklist when with her, like ass, stomach fat, tatoos, scars, skin firmness, age estimation, etc.
I'm much better at noticing things that are problematic if I have a so-so experience. But if it's really terrible, I also will be over critical. So, most objective with middling experience.