What is the most memorable concert that you had attended so far?

I took my wife to see Elton John last night. It was a complete surprise to her. She thought we were driving to Columbus, Ohio to pick up something I bought on Craigslist. She didn't know where we were going until the second we turned into the venue and I told her where going to see Elton John. Her reaction was priceless. Complete emotional breakdown! She's a big fan and has been wanting to see Elton John for the 25 years I've known her.

Anyway, we had PERFECT seats. I bought unsold VIP seats 2 days before the show when they were turned back to the venue (and at about 30% of the original VIP Price!). 10th row, dead center, completely unobstructed view of Sir Elton about 25 feet directly in front of us.

I can't saw it was the best concert I've ever seen (I've seen a lot!), but it was very, very good. But the experience was one of my best ever. My wife was in heaven, completely beside herself with joy. Wow! What a moment. Memorable, to say the least.

@reubent

What a nice surprise!

Your wife has a wonderful husband.

I used to enjoy listening to Elton John through CD.

I am wondering what was the live sound like.

Pink Floyd
Ivor Wynne Stadium 
June 28, 1975

@shkong78 - Sound was pretty good, for a 19,000 seat arena. All of the speakers were hung up high, so no obstruction of the view. The subs, were on either side of the stage, down at floor level. We were dead center and up very close. So, the sound was good, but very loud. Wish I had taken my earplugs, but I forgot them.

I wend to the restrooms and bar back at the back end of the floor and there was much less volume of sound and the SQ was pretty good. 

Can't complain at all, considering it was a big arena.

I have to say it was The Beatles, on my 12th birthday, in Baltimore, my dear dad took me.  There have, and continue to be, countless concerts to follow, but that one stands out for a number of reasons.  I wish I had the opportunity to see Nathan Milstein, as the OP started with.