The first U2 album I heard was Achtung Baby at a friends house in Grade 4. I was instantly hooked.
A year later, I got a cd player for Christmas. I went to go buy my first CD. When Achtung Baby was sold out, I picked The Unforgettable Fire, expecting that all U2's albums sounded like AB ( again, I was in Grade 5 at this point )
I got home and put it on, heard the opening chords to "A Sort of Homecoming" and thought "WTF!!??" in a good way of course.
As for my friend, I feel bad because I think I ruined U2 for him because I played Achtung Baby so much whenever I was at his house lol.