Pop is probably my favorite album, though I acknowledge it’s not their best.
It was the first album to come out during my tenure as a U2 fan. I became a fan in 1995 at the age of 13, and waiting an agonizing 2 years for the next U2 album. I sat up in my bedroom for days and days listening to that album, absorbing every piece of U2 information that I could. It was one of the best experiences I remember from my formative years. The Popmart show in Columbus was my first concert ever, and it was like the culmination of my first 15 years!
So while yes, I believe Joshua Tree, Achtung and some others are better albums, Pop will always be my favorite!