This is my all time favorite album, period. There's not one second of weakness on this album to me. Everything about it captivates me. The artwork is also probably my favorite album cover ever, and perfectly captures the music inside.
The beginning is sublime, setting the stage for what is to come. CSiT is my favorite Maiden opener ever, and also has what I think are the best Maiden solos ever. This and Wasted Years are both in my top 10 Maiden ever, and Heaven Can Wait might be as well. So many moments on this album feel as if they transport me to the album cover, and the performances from the members are absolutely top notch. This wouldn't be my favorite album if it wasn't also consistent, which is one reason why it's also my favorite, and I think the most consistent Maiden album ever. There also seems to be so much..energy..coming from the songs. I can't quite explain it. In addition, I love the lyrics on this album, especially Wasted Years and Long Distance Runner. Some of Adrian's best ever solos, as well as my favorite Nicko album.
I'm also a huge sci-fi fan, which undoubtedly helps my love for SiT. I could go on about this album but that's a summation of my love for it.