First song to "Blow You Away"...

Hey Tvad,
I was a teenager listening to the radio late at night circa 1976 and was "blown away" by what was announced to me afterward as the new Genesis album, the cut being "Dance on a Volcano" Similar experience a year or so later hearing "11th Earl of Mar" from Wind and Wuthering.
Besides that, the 1st time I heard Gentle Giant, and the 1st time I heard King Crimson's "Starless and Bible Black" what a mindblower for a young mind.

Led Zeppelin doing "Gallows Pole."

Not necessarily my favorite song though.

I was photographing the group in concert (one of tens of dozens I've covered) and was allowed on stage just as this song was beginning. Several stacks of amps and speakers literally did "blow me away," although not in a good way.

Good that I was young and walked off stage for Kleenex for the ears before walking back on, otherwise I might not be posting on a high end audio site today.

Satisfaction by the Rolling Stones and Light My Fire by the Doors.

The Spencer Davis Group - Gimme Some Lovin'