I really love that I can reorder the lists - I have starred at the top because that's where I put my "do today" tasks followed by contexts, and I have my 'daily review' lists such as inbox, projects, today, and so on near the bottom.
What I'd love is to be able to add a thin line or break between arbitrary lists in this list so that I could visually/mentally separate the lists I use when I'm in the thick of the day from the ones I use when I'm reviewing my day.
Now I've asked for it, I'd just like to say: This is a really tenuous nice to have - there's much better things that you could do before this one.