It's actually not that simple: there's a common dynamic in all three, where the tall one is noticeably outside social norms, a sort of loud unique snowflake-slash-asshole depending on the fandom, and the shorter one is much better at blending in--and much more interested in blending in--but is, in his own way, as unusual as the tall one. Apparently that's a dynamic I like. :)
For Sherlock/John in particular I like their sort of intense--codependence isn't really the right sense, because they don't need each other, I don't think; they just really prefer each other. And Kris/Adam from American Idol was the same. But Harry/Snape wasn't really like that at all, given their level and tenor of canon interaction. Of course, I mostly read darkfic at the time, so who knows what college-me was thinking!
Anyway, thanks for asking this, the answers are really interesting...
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It's actually not that simple: there's a common dynamic in all three, where the tall one is noticeably outside social norms, a sort of loud unique snowflake-slash-asshole depending on the fandom, and the shorter one is much better at blending in--and much more interested in blending in--but is, in his own way, as unusual as the tall one. Apparently that's a dynamic I like. :)
For Sherlock/John in particular I like their sort of intense--codependence isn't really the right sense, because they don't need each other, I don't think; they just really prefer each other. And Kris/Adam from American Idol was the same. But Harry/Snape wasn't really like that at all, given their level and tenor of canon interaction. Of course, I mostly read darkfic at the time, so who knows what college-me was thinking!
Anyway, thanks for asking this, the answers are really interesting...