Newbie here, so be gentle ...

I'll have to go with Unforgettable Fire because of Edge's atmospherics. And the rhythm ... in general, I prefer faster paced songs to slow ones.
However, to be fair, Zooropa's always been my least favorite album (not that I actively dislike it, I just don't like it near as much as some others), so I haven't really listened to it as much. But lately Stay's been growing on me ... due to some of the live performances I've managed to find. It really builds, doesn't it? Shattering ending.