Your first concert was to see who and when?

Air Supply, 1980 at Luther College (not the hall Dave Matthews recorded at).  10 years old.

I can't remember the order, but I saw both Jethro Tull and King Crimson, late 1970/early 1971, Colston Hall, Bristol. Both were amazing.

I guess technically, fall of 1978, Mahogany Rush at a high school sock hop. But the first live convert that really affected me was Chicago at Chicago's Navy Pier in the summer of 1980.

Believe it or not, Carmen at the Metropolitan Opera House in NYC in 1968 or so. To this day, I don’t love opera but I very much appreciate the talent of the singers & musicians. 

Elton John 1976 summer concert at Madison Square Garden NYC. 👍