as Asian males,I'm sure most of us don't find Hiro offensive at all,after all,geeky Japanese office drones do exist,they deserve their time in the spotlight just like anyone else.
Also,it's probably the fact that Masi speaks perfect English and is very confident in real life that makes this character acceptable,maybe we would be less than thrilled if he actually was an FOB from Japan struggling with his English.
the fact that he's a geek,constantly pushing up his glasses, makes his character interesting,if he were handsome and stereotypically heroic,he would be BORING and not have the fan base he does.
