I'm not a fan of Metallica after AJFA... just my opinion. The "Black" album has one good song- "Holier Than Thou." Other albums have a few good songs. They tried to mix it up, I guess. Can't blame them... Bands get bored doing the same thing over n over. Do I consider them a "sell out?" Ummm no, I just don't like the direction they went.
Remember, this is all my opinion...I think The Beatles are over rated, I think The Rolling Stones shoulda hung it up after "Some Girls" and I've never really liked U2.
When I think of a sellout band, TSOL comes to mind. (Or at least the name-TSOL) They went from being a great punk band and slowly changed into a metal band! Huh? Pantera also comes to mind, they went from a glam band and became hardcore. Ick. Now, I doubt TSOL had all the original members throughout their transition, in fact I know Jack left the band. But Pantera is just utter crap to me. THAT'S a sellout in my opinion.