Stads,
You really hit the nail on the head regarding the dynamic of what those bands wanted. I'd argue Cornell wanted some of that stardom too, however. Regarding Nirvana - never understood the fascination people have with Cobain. He was the worst musician in that band, and as we found out later, not the best songwriter. The media made him the poster child for a movement, and he fell into the trap. He got used the praise, but didn't want to do what was necessary once he was a "star." And then we all know what happened after that.
Pearl Jam is such an oddity. I loved MLB, and still do. And I love PJ's Ten, and most of Vs. After that, to my ears, they completely shied away from what I loved about them, which coincidentally ties into Stone and Jeff's thoughts on Eddie and his direction.