I saw 9 shows on the Zoo TV and Zooropa tours and you could tell they had a lot of fun onstage. Every night you could tell Bono was having a lot of fun playing the Fly, Mirrorball Man and MacPhisto and just playing around on stage.
Larry may have had more fun on this tour than any other, when he had his chance to come up front and sing his song. I saw him do this a few times, singing Dirty Old Town. That was always a highlight of the shows, when he would do this. On his birthday in 92, at Dodger Stadium night 2, they did a satellite link up to Elvira at Knott's Scary (Berry) Farm and she led the audience in singing happy birthday to Larry.
A moment from that tour that sticks in my mind was at the Anaheim Stadium show, show #100 and the final Zoo TV show in the US. As a result this was a highly emoitonal show for the band. I was located next to the mini stage and I still recall The Edge's expression at the end of Satellite of Love. Bono would be singing the song as a duet with Lou Reed on the video screens. As it ended that night, I could see a big smile on Edge's face and a look that suggested that even he was in awe of what was transpiring.
I loved the Popmart tour, which was just as spectacular as Zoo Tv was in the stadiums, but the show did not allow the band to have as much fun as they did with all the unusual elements incorporated into Zoo TV.
By the way, Zoo TV in stadiums was far, far better than it was in arenas.