I disagree. Linus seems plenty likable, although he's blunt in his assessments of what he considers bad ideas. Those can coexist.

And I've never heard anything but good about Woz. He seems like a genuinely nice, enthusiastic, approachable person.

I've never met either of them in person so I can't personally vouch for their charisma, but I don't think of them have reputations as _not_ having it.