Neither did I! I'm pleasantly surprised, though I like Alexander as well.
I guess this is as good a time as any to share my personal story about how CSIT affected my music-listening life, since it's seemingly on the verge of winning the album survivor.
Caught Somewhere In Time was one of the four songs that got me into Iron Maiden (and, consequently, into being a serious music fan). The first three were When the Wild Wind Blows, The Clansman and Brave New World. Of course, I did think that all these songs were cool musically, but the lyrics were the main focus for me. I was extremely musically illiterate at the time (still am with regard to any sort of theory thing, but I'm talking I didn't really know how to identify basic rock instruments by ear or even how to tell when a guitar solo was happening back then), though, and the big draw for me on those three was that I liked the lyrics a lot—it was cool to find a band that sang about history and literature.
Caught Somewhere In Time was the fourth Iron Maiden song I heard, and it was the one that sealed the deal for me. On that one, the lyrics are kinda cool but there's not really a profound meaning to them—not the type of thing that would catch the attention of someone looking for obviously intelligent lyrics. So this was the first song that I really loved for the musical aspect, without lyrics being a factor at all. That intro caught my attention right off the bat. That riff is crazy awesome. And the rest of the song was just as cool—and exciting!—musically. This one really had it all for me from a musical standpoint, and it's the one that completely sold me on this band (which, as I alluded to, was my gateway to Metallica and Rush and eventually then to Dream Theater and almost everything else from there). I remember the first time I heard this song thinking, okay, I'm definitely going to be an Iron Maiden fan.
And this song still excites me to this day, every time. It's a fantastic track that really demonstrates the level of energy and melody that metal can bring when it's at its best. Truly deserving of classic status, in my biased opinion.