I became a fan of U2 back in the 80s, especially after their "War' album was released in 1983.
But my favorite of all their albums, has to be 'Rattle and Hum.'
The 1987 studio album and rockumentary film is an amazing work of art, at least for me.
From 'Helter Skelter' to 'All I Want Is You', this album has so many elements to it, and that's what, I think, makes it so great.

While I love all the tracks, one of my favorites is 'Bullet The Blue Sky.'
Check out this video of the song from a show U2 did at Slane Castle a few years back.