It can also change over time, especially in younger founders. As Garry pointed out elsewhere in this thread, most schools and jobs train you to be somewhat passive.
I agree with this. I actually didn't go the route of school, preferring to just go out on my own, and I was/am amazed at all the passivity.
I think if anything the defining quality of my career is a total lack of being passive. Having no formal training allows you the quality of never being intimidated.
I didn't know anything when I started. I am not concerned about taking on any challenge I know nothing about.