To a degree a lot of the songs from POP and ATYCLB. POP was the first actual studio album by them I purchased as a fan, and I have lots of memories of just zoning out in an inflatable chair in my room listening to it through headphones. I remember how the really trippy middle section of If You Wear That Velvet Dress used to move me, and I would listen to that song over and over just to hear that part. I was a kid just starting to really get into music at that time and had not heard anything like it before. ATYCLB was the first new album to be released while I was a fan. It was my first experience waiting for U2 to record an album...I remember the teaser site they had that looked like a virtual studio, and when they eventually posted 30 second clips of all(?) the songs...especially that first clip of Beautiful Day. Hearing that record for the first time was such a big deal for me, it was my first experience with a NEW U2 album and that was a very special thing. I won't even get into going to that first Elevation concert, my first real concert ever. So now, when I listen to anything from ATYCLB a lot of those old feelings come back, even if it's not my favorite U2 album by any means.