Every band rips off the past, heck, go listen to classical music, Schubert rips off Beethoven.
The honest bands acknowledge their influences, including their "dirty" secrets (like bubblegum pop).
I hate the fantasy of authenticity, punk was total BS, nothing authentic about playing out of tune, and it's dishonest to charge your fans when you're too lazy to practice.
"Indie rock" tends to be built around the need for an in-group to feel superior, few indie rock bands were ever very good, and yes, I have some Replacement CDs.
It's all "popular" music, it's a matter of what you like, so roll with it.
One reason classic rock has remained is they simply wrote better songs, I think it's harder to get writers to collaborate these days, not many Jagger/Richard, Lennon/McCartney combinations, only a few writers like Neil Young or Peter Townsend or Paul Simon can write great songs over a career.
The other reason is record companies had to sell records, so you had to write songs people liked, now with the internet, too easy to be a niche band and wallow in your own ego, with your dedicated fans and the rest of the world shrugging their shoulders.
I download lots of bootleg concerts off the net, especially from festivals, to check out new music. There are some good bands out there, but a lot of crap as well.
My rule is I try to get through a 10-12 song concert, but if half way in I'm bored, I hit delete and move on (I edit out crowd noise, "hello Cleveland comments" etc).
I'm picky because I listen for my own enjoyment, not to prove anything - and I simply don't like heavy metal, rap and hip hop, or "hat" country.
Otherwise I'm all over the place, a big Gram Parsons fan, 60s Miles Davis, Bonnie Raitt, SRV, Dire Straits/Mark Knopfler, Chris Rea, Joe Ely, Drive By Truckers, Elvis Costello, the list goes on and on. Being popular is not a sin, Fleetwood Mac was a great band, so were the Jefferson Airplane (the Mac on acid).
I have a weakness for Americana, which started with the Dead (Workingman's Dead and American Beauty) and the Band.
My favorite CDs:
Layla - Derek and the Dominoes (Clapton and Duane Allman)
Live at Fillmore East - Allman Brothers
Live/Dead - Grateful Dead (of course)
Axis Bold as Love - Hendrix (still the GOAT)
Court of the Crimson King - King Crimson
Led Zeppelin IV - Led Zeppelin (so it's been overplayed to death, so what!)
Waiting for Columbus - Little Feat
Joshua Judges Ruth - Lyle Lovett
Viva Terlingua - Jerry Jeff Walker (yes, I've been to Luckenbach, Texas)
Making Movies - Dire Straits
Dark Side of the Moon - Pink Floyd (there's a reason it sold so many albums)
Warren Zevon - Warren Zevon
Damn the Torpedoes - Tom Petty
Quadrophenia - The Who (the greatest punk band)
Beggar's Banquet/Let It Bleed - The Rolling Stones
Yellow Moon - Neville Brothers
Something Else - The Kinks
Revolver/Rubber Soul - The Beatles
The White Album - The Beatles
Grievous Angel - Gram Parsons
The Gilded Palace of Sin - Flying Burrito Brothers
Younger Than Yesterday - The Byrds
Stop Making Sense - Talking Heads
Avalon - Roxy Music
I Am Shelby Lynne - Shelby Lynne
Seven Year Ache - Rosanne Cash
Rickie Lee Jones - Rickie Lee Jones
Happy Trails - Quicksilver Messenger Service
Neil Young - Neil Young
In a Silent Way - Miles Davis
Kind of Blue - Miles Davis
What's Goin' One - Marvin Gaye
Southern Rock Opera - Drive By Truckers
The Trinity Session - Cowboy Junkies
Past, Present and Future - Al Stewart
Highway 61 Revisited - Bob Dylan
Blood on the Tracks - Bob Dylan
Buffalo Springfield/Buffalo Springfield Again - Buffalo Springfield
Darkness on the Edge of Town - Bruce Springsteen
My Aim Is True/This Year's Model/Armed Forces - Elvis Costello
Trust - Elvis Costello
Fleetwood Mac/Rumours - Fleetwood Mac (two perfect "pop" albums that rock harder than people think)
It's A Beautiful Day - It's a Beautiful Day
Volunteers - Jefferson Airplane
Changes in Latitudes, Changes in Attitudes - Jimmy Buffett (before he became a self-parody and a corporation, he was a darn good songwriter)
Court and Spark - Joni Mitchell
Though I tend to put my own "Greatest Hits" together, computers make that easy.
A lot of great songwriters don't have great albums, but are perfect for 20 or so songs.
And I like soundboard bootlegs, live you can't hide, and a soundboard doesn't disguise you behind crowd noise and stadium distortion.
Some groups play the same set every night, so you just need one concert per tour (Led Zeppelin, Dire Straits, Rolling Stones), others mix it up (Neil Young).
The best Springsteen are the live performances in 1978. After that he started writing to sell records, and the great songs became rare, though 41 Shots is brilliant.
Tom Petty is eclectic, but a great songwriter - he is (was) unabashedly Southern.
Rod Stewart became a parody, but his work with the Small Faces and Jeff Beck and his early albums (up to about 1976) is great.
Elton John is similar, his early stuff is great, then he sold out.