you made a lot of good points, some stronger than others...but encouraging to see a thoughtful thread/post.
everyone has their favorites that hit them differently at different times, even in a single day. for me it's not just the music and lyrics, it's the whole feelings they bring that can change your mood on a really tough day that made me a fan. i first heard whistle and thought it was fun and now even hearing the girls come into their own (like GONE, hello bop) is a whole new mood. you can't please everyone.