The first thing I remember was War hitting big on the radio, and Red Rocks being all over TV. Then UF came out and it was popular on the radio and MTV. Though I've heard the media say it was JT that broke them big, from what I saw, they were already big at the time of Live Aid.
Then with JT they became SUPER big! I remember them being all over the place, TV and radio, and extremely dominant on MTV. For those of you who don't remember, MTV used to be GOOD, mostly videos, and devoted to talking about MUSIC instead of stupid jokes and reality shows. They had lots of specials on U2, and the videos were all in heavy rotation. That, IMO, was the mountaintop, the pinnacle of their career. I also, contrary to popular beilef, never heard negativity over Rattle and Hum. The movie didn't do well, but no rock movies do, they are all too limited appeal to a certain type of music fan. From what I saw, their run on MTV went right through R&H and Lovetown.
Then there was the 'dream it all up again.' I was hoping they wouldn't break up. Then there were rumors Adam was leaving the band.
When AB came out, I don't remember the fans being as shocked as some will say in retrospect (save that for later) It was different, and some people were saying they had 'gone gay' because of the drag pics, but overall the songs were very well liked. ZOOTV was huge, AB popular, the Fly was cool, MacPhisto weird, but he eventually became cool too. The songs and images were all over the place. They were still huge.
Okay, then "Lemon" came out. From what I saw, THIS, not AB, is what made older fans start going "WTF?" Numb too. Stay redeemed them, but Zooropa was not as well liked as AB by most at the time.
Now Pop. I know this isn't going to be popular around here, but this is where they really lost the old fans (at least the ones I know) People started laughing at them, the stupid costumes, the stage set, it was like, WTF they freaked out? Oh sure, we 'got' it, irony, selling themselves as a product, making fun of materialism, Warhol and all that, the bottom line was
it wasn't that good compared to their previous stuff. Sure, there was a rush when it first came out, but after the Kmart stunt and the Las Vegas debacle, a lot of older fans didn't want to play along and drifted away. I realize there are a lot of people here who became fans at Pop, but I will always hold that they lost more fans than they gained during that period. Me, I just about lost interest in the band I had been obsessed with for years. Never even noticed Sweetest Thing. They were off my radar.
Then they came back! And wow, they were themselves again! No more dumb costumes and blinding dayglo. Goodbye, sister disco! Rock and roll lives again! The first time I heard BD I thought THAT is U2? Wow! They're good again! And the Elevation tour, awesome! The heart, soft and cuddly, the band being in touch with the fans, and embracing and loving their past instead of running from it. The band had reached legendary status, for all time.
Vertigo was an extension of that. I don't personally believe they will ever be as good as they were in the 80's and in AB, but they have nothing left to prove. We get it, they're great, legends forever. What a long strange trip it's been.