Surely trying to be Vulcan would have been more suitable for Data, right? 
He can Logic with the best of them and doesn't have to concern himself with trying to understand emotions.
Trying to emulate a person is all well and good, but why a Human person specifically? Is it solely because Soong was a Human?

He can Logic with the best of them and doesn't have to concern himself with trying to understand emotions.
Trying to emulate a person is all well and good, but why a Human person specifically? Is it solely because Soong was a Human?