>>2634994More fair to say it's an East vs West thing.
Western artists prefer top Shiro regardless of pairing because to them bigger authority figure = top. Even with Curtis who's taller a lot of them like to imagine him as a shy soft uke who gets fucked by his strong captain. And they make analyses about how if you look closely it's actually Shiro who's the one pulling him first offscreen in the epilogue to justify it. Eastern fans prefer bottom Shiro regardless of pairing unless he's with Lance then it's 50 50. Sheith is the most visible example for either trend because it's the Shiro pairing that draws the most porn but it's retarded to think it's exclusive to them.
A lot of Eastern fans outright say the reason they prefer K/S because Shiro is a vulnerable gachimuchi damsel princess with oppai being protected by a younger man with a more dominant personality, which is a lot like what people here say about bottom Shiro. So it's got more to do with having a mindset closer to Eastern fujos than tastes in shipping.