Mocked for looking too Asian? I've never been mocked for looking Asian at my school. I do understand your view point, but it doesn't change my fandom. I actually kind of like Ai better than Ran, but I hate pairing her with Shinichi. I prefer pairing Heiji and Kaito with Shinichi than that. (actually, I really, really like KaiShin.)
On that note, why aren't there any avid KaiShins or HeiShins on the 'Who's better off with Shinichi?' forum? It'd be fun to argue with them, though I love their fanfics. So cute!