Cavalcade flows together really well as an album. Not to mention it's a step back from a lot of his downright aggressive stuff or his jungle stuff while still retaining the chaotic structure. The melodies are really nice as well, if I had to compare it to something, I'd say it's like Rossz, only with synth melodies instead of classical elements, if that makes sense.
As for HCCBU, that album, to me, is just really fun to listen to. Ion Divvy is just a listening experience with the massive amount of stereo abuse. As for the rest of the album, I just happen to really like clicks and cuts for percussion and I find humor in all the Speak & Spell/Math samples, yet they fit really well. It sounds delightfully mechanical and robotic.
I mentioned it. Children's Limbo and the remix of Befriend a Childkiller are great.
I actually have 1961 on disk and like it a fair bit. It's different, but still interesting. Has a lot of cheesiness in it though, so I listen to it in small doses. I feel that 1961 is better than the self titled album too.