And just because someone thinks a band is overrated doesn't mean they don't like them. Don't get me wrong, I love me some Nirvana, But I fully understand why someone would find them overrated. They were relevant for like what? 4 years? Nevermind came out in 91, Kurt died in 94. I think they get so much attention sometimes because they ended while they were at their peak of fame. If they were still around today, they would have just faded out of style like most other bands from that era. I feel the same way about Biggie and Tupac in hip-hop. Biggie would probably be just another Busta Rhymes, or DMX if he was still here.
Depends on the day. I gave up rating bands and musicians years ago. It's all a matter of taste, anyway. And, it's a matter of mood. I just don't listen to stuff I don't like, and they are usually certain genres - Modern R&B, Pop, Rap, and virtually anything that is played on "Classic Rock Radio," can't they pick better songs.
I am french, but I have to admit that for me daft punk is the actual most overrated band: - made succes using samples from other artists - not able to play a real instrument or sing on stage
The things you listed that aren't "real instruments" can be used as instruments, though. Maybe not the kind you like but they definitely take talent to work correctly.