yeah, that's how i was. i've been a casual fan of U2 for as long as i can remember, thanks to my aunt. same goes with inxs. the four tapes i played most once i got older were ab, zooropa, kick, and x. (when i was younger i overplayed wham's make it big* and madonna's like a virgin, but whatevs.) circa 96 i bought U2's albums, though i didn't know passengers existed until the internet. then i bought that in 97, after pop.I can't really say what made me a casual fan. I guess because I grew up with their music as a constant presence. Same goes for bands like REM and Crowded House. As early as 1999, I knew one goal of mine was to see U2 live. But then when I heard Gone on the Best Of, 11OTT on the UABRS video, and Bad on RAH, I was completely blown away. Gone convinced me that I needed to own everything U2 had released, and 11OTT and Bad convinced me that I needed everything full stop, bootlegs and all.
so i guess you could say zoo station made me a hardcore fan, since it's the first track of ab. i dunno. i do know when i was a kid my two favourite tracks off ab were zoo station and the fly.