Some forms of indie rock can be quite slippery when you try to get a handle on it. Its quiet, strummy instrumentation means the music itself isn't something that you mind holds onto easily. What's left then is the songs themselves. How's the melody? Do you want to sing along? The best material quietly insinuates itself into your head. The merely competent fades away. The phenomenon seems to be that 10 minutes after the album ends, I've forgotten what I've listened to.