Ahoy!
You know, I was gonna post this exact same topic but I guess you beat me to it!
There's only a couple of songs that I'm not so big on:
1.  Widower - never really seems to get going to me.  I mean, it's alright but there's no real hook to it that makes me come back to it.
2.  Brothers and Sisters - same as Widower, really; it just never seemed to get into my head the way that all other Cable songs do.
I would've agreed with you about God Gave Me Gravity up until I joined this forum.  Everyone on here seems to rave about this song and I never really got what the fuss was all about.  But for some reason I decided to give it a good listen and it really has grown on me a lot.  I hadn't really noticed until Greg started talking about it, but the drumming is amazing and given a bit of time the hooks really start to sink in!
Also, I really like Unknown 2!  But I don't really get what the fuss is all about with Vertigo!
Thanks,
Corporate_Automaton