Hrm.. ok. Im debating about saying all of the above, but there are a few exceptions, so its moot.
Seems easier to do this.
99.9999999% of pop (from Elton John all the way to Kesha)simply due to the scale of history and its gargantuan library of crap)
99.999% of rap (IE:50 cent, Tupac, Dr Dre, Eimenenmeneniliketoeatmen)
99.9% of pop rock (Creedleback, Matchbox 20, ect)
99% of electronica and its derivatives. Seriously.. you can reduce the whole genera down to three songs.
98% of country (Johnny cash and thrash country that is bluegrass can only undo so much)
97.5% of punk (this is due to its decendents in Bubblegum punk, Emo, Screemo, ect. Syd Viscous would be rolling in his grave)
90% of metal and its derivatives.
90% of anything originating in the 80s... until it has been properly covered modernly.
Things of note:
On the metallica debate. Simply they were and are, the pop face of the big 4 of thrash. They have talent, but fact is they have watered it down over they years because well, they got old. (Lars wont even try to play the old stuff because he knows he cant pull off double bass like he once could)
SOAD: I do like SOADs studio albums, but as an actual band and as musicans, there pretty bad. Just watch them live. Serj has a unique style, that is neither good or bad, just unique, but he is perhaps the best musician out of the group. Yes their lyrics are subpar and tend to be repetitive with the political activisim involved.
Greenday: Honestly need to be brought up on charges of crimes against humanity for defiling a genera of music built on anger, and saying fuck you to the establishment, and turning it into a miserable excuse to make power ballads. Their greatest crimes however are the ungodly subgenras they spawned in their wake.
Avenged sevenfold: Dissapointingly bad. Yes some of their radio friendly tracks are pretty decent, but their other tracks on their albums are usually awful.
Nirvana: Most overhyped band of the 90s... sloppy, incoherent and nonsensical. Though, I respect live in new york was perhaps the single best complete album of the decade. the individual songs are just bad.
Audioslave: Chris cornell can ruin everything he touches. The musicans in Rage against the machine were phenominal... and while Audioslave merits a couple good tracks, the Bsides are horrendous, and Cornell manages an impossible feat in making a good band with one bad "singer" even worse
Alcohol: On that link that was posted. wow... just wow.. its Kesha without autotune.Seriously, if you have nothing more to say than your a cadre of drunken tease whores, then just keep your mouth shut, or well, do what you do best and keep your mouth full.
Fact is... all of this is just opinion, and we all know what opinions are like. Have fun quoting me to illustrate how wrong I am and Have a nice day