US // UK
I'll admit I'm not a big fan of the UK cover for Glow. I think the US cover is much more subtle and eye-catching, and I like that the model isn't the central focus. Both covers scream sci-fi, which is good, though I think the UK one gets that point across a bit better. Both fonts are really nice and quite similar, but the US placement wins for me. The US cover also reminds me by Matched and Crossed by Ally Condie, which is never a bad thing!
I don't know if it's just me, but recently I seem to be going off covers with people on them. They're just not doing it for me these days, and I'm guessing it's because I've seen so many. Still, there are one or two coming out that I can't wait to see in person... watch this space!