Paul McCartney at Memorial Staduim in Berkely, 1989.
Possibly because there is something to be said for twenty years of experience? (Which is why I’ll never understand some men who desire a virgin).
The best presumed “lightweight” I have seen in concert was David Pack of Ambrosia - “How Much I Feel”, “Biggest Part Of Me” - total Fluff’n’Nutter right? He was part of a tour called “A Walk Down Abbey Road” with Alan Parsons, Ann Wilson, John Entwhistle and Todd Rundgren covering Beatles songs. And he rocked! He was no more about those wimpy albatrosses that have been hung around his neck than Todd Rundgren is about “Hello It’s Me”.
Update: Actually, that sounds like a great CS thread: Presumed musical lightweights who knocked your socks off
Sadly I don’t remember much of the show, but I remember my fellow students making fun of the opening act, Oleta Adams I think
Her: “It’s time to get ugly.”
Fellow student: “You’re already there.”
And of course when Michael came on stage some were mockingly yelling “We love you Michael”. But of course, being free tickets were were in the nose bleed section, so I doubt that any of the acts heard them.
August 16, 1966. The Beatles, The Cyrkle and Bobby Hebb at JFK Stadium in Philadelphia. It was humid and thundering, the sound was tinny, the crowd was screaming, we were miles up the bleachers and had to use opera glasses to see anything. It was fabulous! I still have my ticket stub. 
My first “REAL” concert was Paul McCartney and Wings in the spring of '76. I’m certain I have the stub somewhere in storage to confirm the exact date (Off the top of my head I think it was around Memorial Day).
I wasn’t 16 yet, and my old man would have put his foot in my ass if he knew I had snuck out down to Chicago.
And it was a lonooonnnng concert. They played almost everything they had put out to that point. (Except I don’t recall them playing anything from RAM. But my memory might be bad). They played almost everything else they had put out to that point. And remember, this was 1976. PM&W had a lot of other hits the next 4 years after that. They did play a couple of Beatles songs.
I’d have to ask a life long friend of mine what we paid for those tickets. Whatever it was, I assure you, we got far, far, FAR more than our moneys worth.
Rush, May 28, 1978 Alpine Valley Music Theatre. East Troy, Wisconsin. I was 16. Great show.
DEVO. 1981. New Traditionalists. Paramount Theater. Portland, Oregon. Black Velvet. Leanne. Plymouth Valiant. It’s A Beautiful World We Live In.
Same tour, Albuquerque.
A good album and the single most underplayed good album in radio history. There is no justice.
We had the same thread a year and a half ago and I think I took top honors: I attended a concert by The Ink Spots in 1948.
- Los Angeles Colosseum. Prince, George Thorogood, J. Geils Band and The Rolling Stones.
October 1, 1971 – The Moody Blues with opening act Charlie Starr at the Oakland Arena. I was a senior in high school, 17 years old and generally un-hip. My parents approved of The Moodies…they seemed to be a “nice” rock band. I was so excited that I was going to see and hear a Mellotron in person…it was awesome!
The other thing that made the concert memorable was seeing a friend’s sister (and classmate in school) sitting a couple rows up, sharing a doobie with her date. She had a reputation as a “hippie” in high school, and that sort of confirmed it for me. 
First concert- Gary Puckett and The Union Gap, Warner Auditorium, Anderson College, 1968 or 69.
Second- Mahogany Rush and Styx (Grand Illusion tour), 1977, Convention Center, Indy.
Third- Bachmann-Turner Overweight and Alice Cooper, 1978, Market Square Arena, Indy.
I sat in the car with my dad in August '66 at Crosley Field (twice- rain made us come back the next day) while my older sister saw the Beatles.
Don’t be ashamed, mine was NKOTB.
Paula Abdul with Color Me Badd as the opening act. In my defense, we were babysitting my then boyfriend’s boss’ son who was 12 and really wanted to see Paula. The boss provided the tickets, so off we went.
August 1982. San Antonio, TX. I was 15.
A triple bill.
**Girlschool **opened, supporting their *Screaming Blue Murder *album.
**Iron Maiden **was next. This was their *The Number of the Beast *American tour.
**Scorpions **headlined. This was their *Blackout *tour.
My sister’s friend was driving, but she screwed up the directions so we missed most of Girlschool’s set. But Maiden and Scorpions on what I still consider their best tours at the height of their popularity?!?! Mind blowing!
…and thus set me on a lifestyle of many nights spent in dark rooms and bright lights with thousands of people for many years. ::sigh::
My first real concert… I was about 15. Kleinhan’s Music Hall in Buffalo, NY. I saw Leonard Bernstein. Lukas Foss was supposed to conduct a Bernstein program, but he was ill and Bernstein himself came. I was already major-league in love with him from the TV Young People’s Concerts. Holy crap- what a passionate, intense, talented man.
Freddie and the Dreamers in Chicago in 1965 or so.
Wow… Freddie and the Dreamers… HEY YOU! Get offa my cloud!!
I saw Cheap Trick at the Arena in Sioux Falls, South Dakota. Their lead band was AC/DC.
The day after the concert, the mayor of Sioux Falls (some crazy lady) led a successful effort to ban “Acid Rock” from the city of Sioux Falls.
I kid you not! Crazy lady mayor thought Cheap Trick and AC/DC were acid rock groups.
This was 1980ish