this chapter lives rent free in my mind so now I'm gonna talk about it
(discussion of jjk chapter 64 below, doesn't really contain spoilers tho)
this is such a small and seemingly inconsequential moment for yuji, but it really does so much for him as a character. I feel like most of the time when a male character has an ideal type it just shapes his interactions with women altogether for the rest of the series: either he views them as "his type" or "not his type" and interacts accordingly, or he learns to treat them all equally despite not being attracted to them. however here yuji completely dismisses his type: he sees ozawa not in relation to what he likes, but just as her own person, who does day to day things elegantly for her own enjoyment, and he appreciates it for what it is.
he knows her name and her mannerisms despite not being attracted to her and when he sees her again after some time he still recognizes her despite her drastic change in appearance, over which he doesn't comment, even though she'd now be his type, instead asking her how she's doing.
he views others, with no distinction between men and women, as their own individual and not an object for his enjoyment or gain. he will observe them and remember their peculiarities simply because he cares and loves doing so.
by using something as superficial as his type, akutami pulled the strings laid out until then for yuji's character, showing how observant and sensitive he actually is. how much people and their individuality, their heart, matter to him. why it hurts him so bad when a life is lost.