I listened to Some Nights nonstop when I got it, for like a week, but I still like Aim & Ignite much more as an album. Of course, with most artists they've gotta get poppier as they progress, but I like Aim & Ignite specifically because of its emphasis on strings/a more classical sound. Also, the beat is less constant, which gave them more freedom to mess around/experiment a bit more, specifically in a song like Be Calm:
fun. - Be Calm [AUDIO] - YouTube
Some Nights is an awesome album, but the autotune in Stars kills that song for me, even though parts of it are so great. I'm really excited to see what they do next. I'm seeing them next month actually, I've heard they're great live!