circamoore
Yeah, I get what you are saying and it's an interesting thing to philosophize about. And you make a good point about Twilight and stuff which are perceived to "put the stereotypical male reader off". Personally I also feel that emotions do get more complicated as we get older, but also more subdued in a way - in that sense melodrama indeed does "fit" better with a younger audience.
Now I'm not an expert on shoujo by any means, but in the case of Citrus most of the complexity just feels like bad writing and unnecessary convoluting of the story by the author due to a lack of good ideas how to drive the story forward. Whereas I actually think there was a lot of depth in BiY, but not all of it was related to the main romantic plot, and it was in my opinion written a lot better and, yes, maybe also for an older audience since it was in a seinen magazine. (I don't think Yuri in shonen is actually a thing, except for fanservice purposes) But that's beside the point.
Anyway, there definitely are a lot of very "girly" elements in Citrus like checking out guys in the beginning, though that is pretty quickly dropped as the story progresses (and surprisingly none of the supporting cast ever express any interest in boys). I guess these are the things which I find hard to analyze spontaneously, because I've always identified strongly with fictional characters no matter their background - I mean, obviously I'd check out any hot male teachers out there if I was Yuzu, lol.
I haven't actually managed to read Hanjuku Joshi just yet, although it's been on my radar for many years already.