Just a few things to take up here--I hope you don't take them the wrong way...
(BTW, hi!) 
Right on the power ballads. (Of course, that probably had somewhat to do with what could get on the radio.) With all due respect, very wrong on Whitesnake--those are some very talented guys, certainly more talented than the Crue, whatever we may think of the music (which is OK, I think). Remember, this is a band whose lead singer was chosen to succeed Ian Gillan in Deep Purple, and whose original bass player, Neil Murray (who plays on the '87 album), had played for three of England's most musically demanding jazz-rock bands before joining Whitesnake. Tommy Aldrige (not on that album) had played with Ozzy and Randy Rhoads on tour. And let's not even talk about the lead guitarists. Anyway, just learn "Still Of The Night" part-for-part and see for yourself.
Glam wasn't about the lyrics, it was about the look.
Which was its first mistake. It has to be about the music first if you're making music, but once you've done that you can do anything else you want. That second part is what no one (on either side of the divide) seems to understand. Music comes before cred, too.
Cobain...did something that's unique: he wrote most of his songs in complete sarcasm.
Heh. Po-mo new-wavers and alterna-heads have been doing that since Elvis Costello. Trust me, any song that actually has a title like "What's So Funny About Peace, Love, And Understanding?" probably wasn't conceived completely in earnest--though it seems Elvis and Nick Lowe, the song's writer, have since learned their lesson.
Glam is a lot more rebellious than Grunge and they lived a harder lifestyle than the Grunge rockers did. But they did a lot more drugs and really weren't that great to women either in the first place.
Maybe. But grunge's rock-star OD casualty list seems to be longer (headed by Andrew Wood and Shannon Hoon). Meanwhile, on the Babe Question, metal has Lita Ford and Doro Pesch (at least); who does grunge have? L7? Drain STH? Are they "grunge"? (While hair-metal has Vixen!)
Grunge rockers...were really not too keen about being in the spotlight; Glam bands meanwhile jumped at a chance at being in the mainstream.
Now considering what's just two sentences above this, is this a paradox, or is it just a have-your-cake-and-eat-it-too contradiction?
Part of it was that glam wore its desire for fame and fortune too much on its sleeve; how could people not understand that eventually there'd be some major blowback? People don't want to have the idea that the musicians who make the music they love actually care about it less than their listeners do.
